ITEM NAME:3 Pcs Socket Adapter Set Hex Shank to 1/4,3/8,1/2 Z3E8 3 Pcs Socket Adapter Set Hex Shank to 1/4,3/8,1/2 Z3E8 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. Specification: Brand new and high quality. Material: Chrome vanadium steel cr-v. 1/4"*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. Package Included: 1 x Socket Adapter Hex Shank set(3 pcs a set) Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm..1 x Socket Adapter Hex Shank set(3 pcs a set). The 1/4" hex shank fits all quick change chucks as well as standard drill chucks. Change Your Hand Socket Set Into A Driven Socket Set. 1/4" 1/4" 50mm--1/4 "shank can be converted into 6.35 mm square.