ITEM NAME:4PCS Drive Socket Reducer Air Impact Wrench Adapter Hand Craft Tools Set AST Descriptio n Description: 4pcs Convertor Set This set allows you to mix and match drive sizes for your sockets, ratchet handles, extension bars and other accessories. Ideal tool for mechanics, engineers, carpenters or DIY enthusiasts Sprung Ball bearing fitting retainer Specification: Size: 1/2 "to 3/8" - (12.7mm square hole to 9.53mm square head) Length: 36mm 3/8 "to 1/4" - (9.53mm square hole to 6.35mm square head) Length: 26mm 3/8 "to 1/2" - (9.53mm square hole to 12.7mm square head) Length: 35mm 1/4 "to 3/8" - (6.35mm square hole to 9.53mm square head) Length: 25mm Height: about 25mm, 26mm, 35mm, 36mm Hardness: 60HRC Made from Chrome Vanadium Steel Included: 4PCS Ratchet Socket Adapter Reducer Converter Set Tool Kit 1/4" 3/8" 1/2" We offer you what you need! Socket Wrench.4pcs Convertor Set. 4PCS Ratchet Socket Adapter Reducer Converter Set Tool Kit 1/4" 3/8" 1/2". Socket Wrench. Hardness: 60HRC. We'd like to settle any problem in a friendly manner. This set allows you to mix and match drive sizes for your sockets, ratchet handles, extension bars and other accessories.