Description:  3pc 1/4 Inch Hex Socket Driver Set Wrench Adapter Extension Bar Bit.     Features:  Chrome Vanadium Steel 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;    Specifications:  Material: chrome vanadium steel CR-V;  1/4"- 1/4" :  50mm Long --1/4 "shank can be converted into 6.35 mm square;  3/8"- 1/4" :  50mm Long --1/4 "shank can be converted into 9.53 mm square;  1/2"- 1/4" :  50mm Long --1/4 "shank can be converted into 12.7 mm square;  All Sockets Standard 1/4" Hex Shank;  Application: suitable for screwdriver handle and an electric screwdriver tool (the six angle hole or three jaw chuck can be used on the drive sleeve), installed after the original six angle edge size conversion for square size, which can be used for the socket installation, it is good conversion parts.     Package Included:  1x  (1/4" hex shank to 1/4" socket)Socket Adapter;  1x  (1/4" hex shank to 3/8" socket),Socket Adapter;  1x  (1/4" hex shank to 1/2" socket) Socket Adapter