Specifications:Chrome vanadium steel is suitable for heavy duty impact drivers.Spring loaded ball bearing on head holds sockets securely.Suitable for quick change 1/4" chuck systems or directly into drill chuck.Change your hand socket set into a driven socket set.This set is perfect for your impact driver or drill, and allows you to replace your ratchet with a power tool.These impact ready adapters are rated for the most demanding of applications (2000 in/lb of torque).The 1/4" hex shank fits all quick change chucks as well as standard drill chucks.Type: Drill Bits SetMain Color: SilverQuantity: 3 PcsMaterial: Chrome-vanadium Steel Cr-vSize Details1/4"*1/4"*50mm--1/4 "shank can be converted into 6.35 mm square.3/8"*1/4"*50mm--1/4 "shank can be converted into 9.53 mm square.1/2"*1/4"*50mm--1/4 "shank can be converted into 12.7 mm square.Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Socket Adapter Hex Shank Set(3 Pcs)