{"product_id":"durston-2124-ring-stretcher-mandrels-set-of-3","title":"Jeu de 3 mandrins à agrandir les bagues Durston 2124","description":"\u003cp\u003eThis compact set of ring stretcher mandrels lets you enlarge and size rings with controlled pressure, whether you are at the bench or working on the go. Clamp the mandrel securely, snug the ring down with the center bolt, and the metal eases out smoothly into its new size.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of three expanding ring stretcher mandrels covering small, medium, and large ring size ranges.\u003c\/li\u003e\n  \u003cli\u003eCompact design stores easily in a drawer or tool roll and is suitable for mobile or small workshops.\u003c\/li\u003e\n  \u003cli\u003eCan be secured in a vise or clamp, or used with a lathe\/polisher for controlled, powered stretching.\u003c\/li\u003e\n  \u003cli\u003eCenter bolt expansion tightened with the included hex key for even ring enlargement.\u003c\/li\u003e\n  \u003cli\u003eSupports both sizing adjustments and gentle reshaping of out-of-round rings.\u003c\/li\u003e\n  \u003cli\u003eDesigned to complement Durston’s ring stretcher\/reducer tools and general ring sizing workflow.\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\u003eMedium Diameter Range\u003c\/td\u003e\n    \u003ctd\u003e17.5–20.5 mm (approx. 0.69–0.81\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eLarge Diameter Range\u003c\/td\u003e\n    \u003ctd\u003e21–24 mm (approx. 0.83–0.94\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTotal Length (each mandrel)\u003c\/td\u003e\n    \u003ctd\u003e92 mm (approx. 3.62\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSet Type\u003c\/td\u003e\n    \u003ctd\u003eExpanding ring stretcher mandrels (small, medium, large)\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\u003eRing stretcher mandrel – small\u003c\/td\u003e\n    \u003ctd\u003eExpanding mandrel for smaller ring sizes\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRing stretcher mandrel – medium\u003c\/td\u003e\n    \u003ctd\u003eExpanding mandrel for mid-range ring sizes\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRing stretcher mandrel – large\u003c\/td\u003e\n    \u003ctd\u003eExpanding mandrel for larger ring sizes\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 mandrels\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eSecure each mandrel in a bench vise, clamp, or suitable holder, or use with an appropriate lathe\/polisher according to your workshop setup.\u003c\/p\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003ePlace the ring over the appropriate mandrel, then tighten the center bolt gradually to stretch the ring. Work slowly 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":45999502164182,"sku":"148.2124","price":281.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/durston-2124-ring-stretcher-mandrels-set-of-3-otto-frei-1.jpg?v=1726697773","url":"https:\/\/www.ottofrei.com\/fr\/products\/durston-2124-ring-stretcher-mandrels-set-of-3","provider":"Otto Frei","version":"1.0","type":"link"}