{"product_id":"durston-2125-small-ring-stretcher-mandrel","title":"Durston 2125 Small Ring Stretcher Mandrel","description":"\u003cp\u003eThis small expanding ring stretcher mandrel is designed to enlarge and size rings in the 14–17 mm range, in a compact format that tucks easily into a drawer or travel kit. Once clamped, the mandrel expands smoothly as you tighten the center bolt, nudging the shank out to size in small, controlled steps.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCompact expanding mandrel sized specifically for smaller ring diameters.\u003c\/li\u003e\n  \u003cli\u003eStores easily in a drawer, toolbox, or roll, ideal for mobile or space-limited setups.\u003c\/li\u003e\n  \u003cli\u003eCan be secured in a vice or clamp, or used with a suitable lathe or polisher.\u003c\/li\u003e\n  \u003cli\u003eCenter bolt expansion tightened with the included hex key for even, controlled stretching.\u003c\/li\u003e\n  \u003cli\u003eUseful for gentle size adjustments and for truing slightly out-of-round rings.\u003c\/li\u003e\n  \u003cli\u003eFits naturally into existing ring sizing workflows alongside other Durston ring tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eDetail\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSmall Diameter Range\u003c\/td\u003e\n    \u003ctd\u003e14–17 mm (approx. 0.55–0.67\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTotal Length\u003c\/td\u003e\n    \u003ctd\u003e92 mm (approx. 3.6\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTool Type\u003c\/td\u003e\n    \u003ctd\u003eExpanding ring stretcher mandrel\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMounting\u003c\/td\u003e\n    \u003ctd\u003eUse in vice, clamp, or with suitable lathe\/polisher\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eBrand\u003c\/td\u003e\n    \u003ctd\u003eDurston\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eItem\u003c\/th\u003e\n    \u003cth\u003eDescription\u003c\/th\u003e\n    \u003cth\u003eQty\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSmall ring stretcher mandrel\u003c\/td\u003e\n    \u003ctd\u003eExpanding mandrel for 14–17 mm ring diameters\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eHex key\u003c\/td\u003e\n    \u003ctd\u003eFor tightening the center bolt to expand the mandrel\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eSecure the mandrel firmly in a vice, clamp, or appropriate machine fixture before use. Place the ring over the mandrel, then tighten the center bolt gradually with the hex key to stretch the ring. Work in small increments and check the size frequently to avoid over-stretching, especially on soldered or stone-set rings.\u003c\/p\u003e\n","brand":"Durston","offers":[{"title":"Default Title","offer_id":45999501934806,"sku":"148.2125","price":73.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/durston-2125-small-ring-stretcher-mandrel-otto-frei-1.jpg?v=1726697765","url":"https:\/\/www.ottofrei.com\/es\/products\/durston-2125-small-ring-stretcher-mandrel","provider":"Otto Frei","version":"1.0","type":"link"}