["Features: Aluminum Alloy Material Suitable for Heavy Duty Impact Drivers Spring Loaded Ball Bearing on for Head Holds Sockets Securely Suitable for Quick Change 1 or 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 The 1 or 4" hex shank fits all quick change chucks as well as standard drill chucks Socket Bit Adapter Drill Nut Driver Power Extension Bar 3pc Set 1 or 4" 3 or 8" 1 or 2" Specifications: Material: Chrome-vanadium Steel Chromium Plating All Sockets Standard 1 or 4" Hex Shank Size: 1 or 4 x 1 or 4 x 65mm length - - - 1 or 4 " shank can be converted to 6.35mm square head 3 or 8 x 1 or 4 x 65.8mm length - - - 1 or 4 " shank can be converted to 9.4mm square head 1 or 2 x 1 or 4 x 68mm length - - - 1 or 4 " shank can be converted to 12.6mm square head Quantity: 1 Set or 3 Pcs Note: It is manual measurement, there may be 1-2mm error,please to understand. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x (1 or 4" hex shank to 1 or 4" socket)Socket Adapter 1 x (1 or 4" hex shank to 3 or 8" socket)Socket Adapter 1 x (1 or 4" hex shank to 1 or 2" socket)Socket Adapter"] Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store