... :ISO,GB,DIN,ANSI Cretificate:ISO9001-2008,ROHS OEM:manufacturer Socket Wrench Key Socket Wrench Key Material:45#,cr-vSize:M1-M24Finish treatment:zinc ... or plastic card,or according to customer requirementDimensions Product name Socket Wrench Key Specification M1-M24MaterialA-2 Stainless Steel alloy with 17 ... - 19% Chromium and 8-13% Nickel,4.8,6.8,8.8,12.9Material grade A2,A4 ...