{"product_id":"steel-ring-mandrel-usa-sizes-1-15-quarter-size-no-groove","title":"Steel Ring Mandrel Graduated In USA sizes 1 To 15 By 1\/4 Size-No Groove","description":"\u003cp\u003eA reliable workhorse for the bench, this hardened steel ring mandrel is graduated in USA sizes from 1 to 15 in 1\/4-size increments — no groove. Otto Frei sourced this mandrel after testing multiple mid-priced options and found it to be the best of the group: accurately sized, properly hardened, and produced on modern CNC machinery. It is an excellent choice for beginners, students, and working jewelers who need a dependable mandrel at a practical price point.\u003c\/p\u003e\u003cp\u003eManufactured in India by the same factory that produces mandrels sold under major jewelry tool brand names, this mandrel is made on German CNC equipment — a detail that speaks directly to the consistency of its graduation marks and the quality of its taper.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGraduated in USA ring sizes 1 through 15 in 1\/4-size steps\u003c\/li\u003e\n\u003cli\u003eNo groove — clean, uninterrupted taper surface\u003c\/li\u003e\n\u003cli\u003eProperly hardened steel for durability and accurate sizing\u003c\/li\u003e\n\u003cli\u003eProduced on German CNC machinery for consistent graduation accuracy\u003c\/li\u003e\n\u003cli\u003eRecommended for beginners, students, and everyday bench use\u003c\/li\u003e\n\u003cli\u003eOtto Frei tested and selected as the best mid-priced ring mandrel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eHardened steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003eUSA sizes 1–15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGraduation Increment\u003c\/th\u003e\n\u003ctd\u003e1\/4 size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGroove\u003c\/th\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eIndia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43579769880790,"sku":"143.079","price":21.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/steel-ring-mandrel-graduated-in-usa-sizes-1-to-15-by-14-size-no-groove-otto-frei.jpg?v=1719958460","url":"https:\/\/www.ottofrei.com\/products\/steel-ring-mandrel-usa-sizes-1-15-quarter-size-no-groove","provider":"Otto Frei","version":"1.0","type":"link"}