[EXTRA MANDREL] Diameter:1.5mm/0.059Inch 2mm/0.079Inch 2.5mm/0.098Inch 3mm/0.118Inch 3.5mm/0.138Inch. Made of stainless steel for your long lasting use. Clear marks for your convenient identification. [WHAT YOU GET] 1 x 5.5Inch wire looping mandrel(large), 1 x 5.5Inch wire looping mandrel(Small), 1 x extra 4Inch wire looping mandrel. [LARGE SIZE] Diameter:6mm/0.236Inch 7mm/0.275Inch 8mm/0.315Inch 9mm/0.354Inch 10mm/0.394Inch. Made of stainless steel for your long lasting use. The PVC handles for anti-slip and comfort grip. [SMALL SIZE] Diameter:1.5mm/0.059Inch 2mm/0.079Inch 3mm/0.118Inch 4mm/0.157Inch 5mm/0.197Inch. Made of stainless steel for your long lasting use. The PVC handles for anti-slip and comfort grip. [APPLICATION] Work fine on wire forming,wire loops,jump ring making. earring making andand other DIY jewelry crafts.With rounded and smooth not scratch the items., Weight: 0.19400679056 Pounds, Manufacturer: Tuidzljd