4pcs 1/4 3/8 1/2 Drive Socket Adapter Converter Reducer Air Impact Craftsman Socket Wrench Adapter Hand Tools Set BI115+Description:4pcs Convertor SetThis 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 enthusiastsSprung Ball bearing fitting retainerSpecification:Size:1/2 "to 3/8" - (12.5mm square hole to 9.5mm square head) Length: 36mm3/8 "to 1/4" - (9.5mm square hole to 6.3mm square head) Length: 26mm3/8 "to 1/2" - (9.5mm square hole to 12.5mm square head) Length: 35mm1/4 "to 3/8" - (6.3mm square hole to 9.5mm square head) Length: 25mmHeight: about 25mm, 26mm, 35mm, 36mmHardness: 60HRCMade from Chrome Vanadium Steel 4pc Ratchet Socket Adapter Reducer Converter Set Tool Kit 1/4" 3/8" 1/2"