{"product_id":"durston-1303-gem-ring-stretcher-17-piece","title":"Durston 1303 Gem Ring Stretcher - 148.349","description":"\u003ch2\u003eDurston 1303 Gem Ring Stretcher - 148.349\u003c\/h2\u003e\n\u003cp\u003eThe Durston 1303 Gem Ring Stretcher is purpose-built for enlarging stone-set rings without disturbing the setting. By selectively stretching the ring shank opposite the stone, this tool allows jewelers to size up rings that would otherwise be difficult or impossible to resize using traditional methods.\u003c\/p\u003e\n\u003cp\u003eTo use, select the roller that best matches the profile of the ring shank, place the shank on the center die, and roll back and forth across the bottom of the shank to gently and evenly stretch the metal. Once stretched, the ring can be rounded on a steel ring mandrel to restore its shape and finish the sizing process.\u003c\/p\u003e\n\u003cp\u003eWhile not suitable for every stone-set ring, the Durston Gem Ring Stretcher accommodates the majority of shank profiles and thicknesses. The included 17-piece roller set provides the flexibility needed to work across a wide range of ring styles.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eSelectively stretches the ring shank opposite the stone setting\u003c\/li\u003e\n\u003cli\u003eAllows sizing of most stone-set rings without removing the stone\u003c\/li\u003e\n\u003cli\u003eChoose from included rollers to match the ring shank profile\u003c\/li\u003e\n\u003cli\u003eCenter die supports the shank during the stretching process\u003c\/li\u003e\n\u003cli\u003eRolling action provides gentle, controlled metal stretching\u003c\/li\u003e\n\u003cli\u003eFinish resizing by rounding on a steel ring mandrel\u003c\/li\u003e\n\u003cli\u003eIncludes a 17-piece roller set to accommodate most shank thicknesses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cstyle type=\"text\/css\"\u003e\n.tg  {border-collapse:collapse;border-spacing:0;}\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg .tg-cly1{text-align:left;vertical-align:middle}\n.tg .tg-wa1i{font-weight:bold;text-align:center;vertical-align:middle}\n\u003c\/style\u003e\n\u003ctable class=\"tg\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"tg-wa1i\"\u003eModel\u003c\/th\u003e\n\u003cth class=\"tg-cly1\"\u003eDurston 1303\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-wa1i\"\u003eRoller Set\u003c\/td\u003e\n\u003ctd class=\"tg-cly1\"\u003e17 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-wa1i\"\u003eVariants\u003c\/td\u003e\n\u003ctd class=\"tg-cly1\"\u003eSingle configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1fmght7\" data-start=\"28\" data-end=\"272\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"79\"\u003ePrecision Solution for Tight Ring Adjustments\u003c\/strong\u003e\u003cbr data-start=\"79\" data-end=\"82\"\u003eThe Durston 1303 Gem Ring Stretcher (148.349) is designed to \u003cstrong data-start=\"145\" data-end=\"182\"\u003ecarefully enlarge stone-set rings\u003c\/strong\u003e without removing stones or stressing the setting, using controlled mechanical stretching.\u003c\/li\u003e\n\u003cli data-section-id=\"9ce9us\" data-start=\"274\" data-end=\"452\"\u003e\n\u003cstrong data-start=\"276\" data-end=\"307\"\u003eStone-Safe Expansion Method\u003c\/strong\u003e\u003cbr data-start=\"307\" data-end=\"310\"\u003eWorks by applying pressure to the \u003cstrong data-start=\"346\" data-end=\"381\"\u003ering shank opposite the setting\u003c\/strong\u003e, helping maintain prong security while gradually increasing ring size.\u003c\/li\u003e\n\u003cli data-section-id=\"13nhrij\" data-start=\"454\" data-end=\"714\"\u003e\n\u003cstrong data-start=\"456\" data-end=\"495\"\u003eMulti-Roller System for Versatility\u003c\/strong\u003e\u003cbr data-start=\"495\" data-end=\"498\"\u003eIncludes a \u003cstrong data-start=\"511\" data-end=\"534\"\u003e17-piece roller set\u003c\/strong\u003e to accommodate different shank shapes and thicknesses, ensuring \u003cstrong data-start=\"599\" data-end=\"646\" data-is-only-node=\"\"\u003eaccurate contact and controlled deformation\u003c\/strong\u003e across a wide range of rings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ydy9jx\" data-start=\"716\" data-end=\"937\"\u003e\n\u003cstrong data-start=\"718\" data-end=\"757\"\u003eDesigned for Professional Bench Use\u003c\/strong\u003e\u003cbr data-start=\"757\" data-end=\"760\"\u003eBuilt with a \u003cstrong data-start=\"775\" data-end=\"831\"\u003eheavy-duty cast iron body and bench-mount capability\u003c\/strong\u003e, providing stability and repeatable results in repair environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1yuycrn\" data-start=\"939\" data-end=\"1147\"\u003e\n\u003cstrong data-start=\"941\" data-end=\"984\"\u003eControlled, Low-Risk Adjustment Process\u003c\/strong\u003e\u003cbr data-start=\"984\" data-end=\"987\"\u003eUnlike aggressive stretching methods, this system \u003cstrong data-start=\"1039\" data-end=\"1082\"\u003egradually rolls and elongates the metal\u003c\/strong\u003e, reducing the risk of cracking, thinning, or loosening settings.\u003c\/li\u003e\n\u003cli data-section-id=\"io12sp\" data-start=\"1149\" data-end=\"1305\"\u003e\n\u003cstrong data-start=\"1151\" data-end=\"1179\"\u003eWorkshop Efficiency Tool\u003c\/strong\u003e\u003cbr data-start=\"1179\" data-end=\"1182\"\u003eIdeal for jewellers handling \u003cstrong data-start=\"1213\" data-end=\"1244\"\u003efrequent ring resizing work\u003c\/strong\u003e, especially when speed and stone safety are both priorities.\u003c\/li\u003e\n\u003cli data-section-id=\"1yw7hxj\" data-start=\"1307\" data-end=\"1459\"\u003e\n\u003cstrong data-start=\"1309\" data-end=\"1344\"\u003eDurston Engineering Reliability\u003c\/strong\u003e\u003cbr data-start=\"1344\" data-end=\"1347\"\u003eMade to professional standards for \u003cstrong data-start=\"1384\" data-end=\"1458\"\u003elong-term durability, smooth operation, and consistent sizing accuracy\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cdiv class=\"flex flex-col text-sm\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:ee781287-4424-46ec-b766-23e7b2316602-14\" data-testid=\"conversation-turn-30\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"e6de9fc7-231c-4743-9be7-9a03725bafc7\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-start=\"52\" data-end=\"307\"\u003e\u003cstrong data-start=\"52\" data-end=\"107\"\u003eQ: What is the Durston Gem Ring Stretcher used for?\u003c\/strong\u003e\u003cbr data-start=\"107\" data-end=\"110\"\u003eA: It is a precision jewelry tool designed to \u003cstrong data-start=\"156\" data-end=\"190\"\u003esafely enlarge stone-set rings\u003c\/strong\u003e by stretching the ring shank without loosening prongs or damaging gemstones. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"309\" data-end=\"583\"\u003e\u003cstrong data-start=\"309\" data-end=\"333\"\u003eQ: How does it work?\u003c\/strong\u003e\u003cbr data-start=\"333\" data-end=\"336\"\u003eA: The tool uses a \u003cstrong data-start=\"355\" data-end=\"377\"\u003erolling die system\u003c\/strong\u003e that is placed under the ring shank. By rolling across the metal, it gradually stretches the band in a controlled way, focusing pressure away from the stone setting. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"585\" data-end=\"802\"\u003e\u003cstrong data-start=\"585\" data-end=\"622\"\u003eQ: What is included with the set?\u003c\/strong\u003e\u003cbr data-start=\"622\" data-end=\"625\"\u003eA: It comes with a \u003cstrong data-start=\"644\" data-end=\"667\"\u003e17-piece roller set\u003c\/strong\u003e designed to match different ring shank thicknesses and profiles for accurate, even stretching. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"804\" data-end=\"1037\"\u003e\u003cstrong data-start=\"804\" data-end=\"849\"\u003eQ: What types of rings can it be used on?\u003c\/strong\u003e\u003cbr data-start=\"849\" data-end=\"852\"\u003eA: It is suitable for \u003cstrong data-start=\"874\" data-end=\"898\"\u003emost stone-set rings\u003c\/strong\u003e, especially those with sturdy shanks, but not recommended for delicate or highly fragile settings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1039\" data-end=\"1270\"\u003e\u003cstrong data-start=\"1039\" data-end=\"1071\"\u003eQ: Is it safe for gemstones?\u003c\/strong\u003e\u003cbr data-start=\"1071\" data-end=\"1074\"\u003eA: Yes—when used correctly, it is designed to \u003cstrong data-start=\"1120\" data-end=\"1162\"\u003eminimize stress on prongs and settings\u003c\/strong\u003e, reducing risk compared to manual hammering or forcing a ring open. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1272\" data-end=\"1504\"\u003e\u003cstrong data-start=\"1272\" data-end=\"1310\"\u003eQ: What is the build quality like?\u003c\/strong\u003e\u003cbr data-start=\"1310\" data-end=\"1313\"\u003eA: It is made from \u003cstrong data-start=\"1332\" data-end=\"1384\"\u003eheavy-duty cast iron with a powder-coated finish\u003c\/strong\u003e, designed for long-term professional workshop use and bench mounting stability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1506\" data-end=\"1674\"\u003e\u003cstrong data-start=\"1506\" data-end=\"1537\"\u003eQ: Can it be bench mounted?\u003c\/strong\u003e\u003cbr data-start=\"1537\" data-end=\"1540\"\u003eA: Yes, it has \u003cstrong data-start=\"1555\" data-end=\"1596\"\u003epre-drilled holes for secure mounting\u003c\/strong\u003e, ensuring stability during operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1676\" data-end=\"1836\"\u003e\u003cstrong data-start=\"1676\" data-end=\"1719\"\u003eQ: Is it suitable for professional use?\u003c\/strong\u003e\u003cbr data-start=\"1719\" data-end=\"1722\"\u003eA: Absolutely—it is widely used in \u003cstrong data-start=\"1757\" data-end=\"1803\"\u003ejewelry repair and manufacturing workshops\u003c\/strong\u003e for controlled ring sizing work.\u003c\/p\u003e\n\u003cp data-start=\"1838\" data-end=\"2038\"\u003e\u003cstrong data-start=\"1838\" data-end=\"1876\"\u003eQ: What makes this tool stand out?\u003c\/strong\u003e\u003cbr data-start=\"1876\" data-end=\"1879\"\u003eA: Its key advantage is \u003cstrong data-start=\"1903\" data-end=\"1946\"\u003econtrolled, stone-safe ring enlargement\u003c\/strong\u003e, offering a more precise and less risky alternative to traditional ring stretching methods.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"18xl0qc\" data-start=\"58\" data-end=\"167\"\u003e\n\u003cstrong data-start=\"60\" data-end=\"80\"\u003eClean after use:\u003c\/strong\u003e Remove metal particles and polishing residue from mandrels and expanding components.\u003c\/li\u003e\n\u003cli data-section-id=\"iufc9\" data-start=\"168\" data-end=\"290\"\u003e\n\u003cstrong data-start=\"170\" data-end=\"192\"\u003eLight lubrication:\u003c\/strong\u003e Apply a small amount of machine oil to moving parts and threaded sections for smooth expansion.\u003c\/li\u003e\n\u003cli data-section-id=\"o3iyud\" data-start=\"291\" data-end=\"422\"\u003e\n\u003cstrong data-start=\"293\" data-end=\"329\"\u003eProtect gemstone-safe operation:\u003c\/strong\u003e Ensure rings are properly aligned and stones are secure before stretching to avoid damage.\u003c\/li\u003e\n\u003cli data-section-id=\"1nu01fr\" data-start=\"423\" data-end=\"534\"\u003e\n\u003cstrong data-start=\"425\" data-end=\"450\"\u003eAvoid over-expansion:\u003c\/strong\u003e Stretch gradually in small increments to prevent tool strain and ring distortion.\u003c\/li\u003e\n\u003cli data-section-id=\"1o569ob\" data-start=\"535\" data-end=\"638\"\u003e\n\u003cstrong data-start=\"537\" data-end=\"568\"\u003eInspect mandrels regularly:\u003c\/strong\u003e Check for wear, scoring, or deformation that could affect accuracy.\u003c\/li\u003e\n\u003cli data-section-id=\"15c6uzi\" data-start=\"639\" data-end=\"744\"\u003e\n\u003cstrong data-start=\"641\" data-end=\"668\"\u003eKeep mechanism aligned:\u003c\/strong\u003e Ensure smooth, centered operation to maintain even pressure distribution.\u003c\/li\u003e\n\u003cli data-section-id=\"1k71g3x\" data-start=\"745\" data-end=\"851\"\u003e\n\u003cstrong data-start=\"747\" data-end=\"775\"\u003eStore in dry conditions:\u003c\/strong\u003e Wipe down with anti-rust protection and keep free from moisture and dust\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Durston","offers":[{"title":"Default Title","offer_id":45503972212927,"sku":"148.349","price":332.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/durston-1303-gem-ring-stretcher-otto-frei.jpg?v=1776335332","url":"https:\/\/www.mybackyardzone.com\/products\/durston-1303-gem-ring-stretcher-17-piece","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}