The 3pcs socket adapters can change your hand socket set into a driven socket set, change 1/4" hex shank to 1/4" 3/8" 1/2" socket quickly and easily. Features: Spring loaded ball bearing on h-ead 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 p-ower 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 p-ower extension bar 1/4" 3/8" 1/2". Specifications: Material: Aluminum alloy Sockets Standard: 1/4" Hex Shank Type + Length: (1/4" hex shank to 1/4" socket) Socket Adapter, Length: 65mm / 2.56in (1/4" hex shank to 3/8" socket) Socket Adapter, Length: 65.8mm / 2.59in (1/4" hex shank to 1/2" socket) Socket Adapter, Length: 68mm / 2.68in Quantity: 3Pcs/Set Package Weight: 92g / 3.25ounces Package Size: 80 * 50 * 30mm / 3.15 * 1.97 * 1.18in Packing List: 3 * Socket Adapter