Features: This socket adapter is made of quality metal material, high strength, abrasion resistance and durable. Spring loaded ball bearing on head holds sockets securely. Change your hand socket set into a driven socket with different size. 3pcs per set, can change drill bit into 1/4'', 3/8'' and 1/2'' type. Perfect for your impact driver or drill. Specification: Material: Metal Color: Shown as picture Quantity: 3pcs Diameter: Approx. Blue-12.5mm / 0.49inch; Yellow-9.5mm / 0.37inch; Red-6.3mm / 0.25inch Length: Approx. Blue-72mm / 2.83inch; Yellow-65mm / 2.56inch; Red-65mm / 2.56inch Weight: Approx. 114g Package List: 1 x (1/4" hex shank to 1/4" socket)Socket Adapter 1 x (1/4" hex shank to 3/8" socket)Socket Adapter 1 x (1/4" hex shank to 1/2" socket)Socket Adapter Other items in the picture are not included. 1、This socket adapter is made of quality metal material, high strength, abrasion resistance and durable 2、Spring loaded ball bearing on head holds sockets securely 3、Change your hand socket set into a driven socket with different size 4、3pcs per set, can change drill bit into 1/4'', 3/8'' and 1/2'' type 5、Perfect for your impact driver or drill