Specifications: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.Perfect for your impact driver or drill.Allows you to replace your ratchet with a power tool.These impact ready adapters are rated for the most demanding of applications.The 1/4" hex shank fits all quick change chucks as well as standard drill chucks.Socket bit adapter drill nut driver power extension bar 1/4", 3/8", 1/2".Type: Drill Bits BarQuantity: 3 Pcs/1 SetMaterial: Chrome Vanadium SteelSize Details:1/4" Hex Shank to 1/4" 6.35mm Square Head Socket Length: 65mm/2.56" (Approx.)1/4" Hex Shank to 3/8" 9.4mm Square Head Socket Length: 65mm/2.56" (Approx.)1/4" Hex Shank to 1/2" 12.6mm Square Head Socket Length: 72mm/2.83" (Approx.)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:3 x Socket Adapter Hex Shank Drill Bits Rod Bars