3PC 1/4 3/8 1/2" Hex Power Drill Bit Driver Socket Bits Set Adapter Wrench Sleeve Extension Bar For Electric Screwdriver BitsFeatures Made from Chrome Vanadium Steel , suitable for Heavy Duty Impact DriversSpring Loaded Ball Bearing on Head Holds Sockets SelySuitable for Quick Change 1/4" Chuck Systems or Directly into Drill ChuckChange Your Hand Socket Set Into A Driven Socket Set (HEX turn to square head)This set is perfect for your impact driver or drill, and allows you to replace your ratchet with a power toolThese 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 Specification Material:CR-VSize:1/4" to 1/4" hex shank 3/8" to 1/4" hex shank 1/2" to 1/4" hex shankLength:50mmPackage Includes 1 x 3pcs 50mm Socket Adapter (Packed Safely in Bubble Bag.)