Features: *3pcs Universal Joint Socket Set Swivel Drive Adapter Reducer 1/4" 3/8" 1/2''. *High quality chrome vanadium steel universal joint socket set. *Spring loaded ball bearing on head holds sockets/extensions securely. *Locks onto ratchet or extension bar. *Allows easy access in awkward areas. *It is applied to repair, car modification, wrench socket transformation, to make leverages can turn to any direction. Specifications: Product Name: Universal Joint Socket Material: Chrome Vanadium Steel Color: Silver Size: 1/4 "(6.3mm); 3/8" (10mm); 1/2 "(12.5mm) Total length: 41mm; 51mm; 70mm (Approx.) Suitable for: all the hexagonal side handle four square hole groove, the sleeve can be conversed to each other freely, easy to use. Quantity: 3pcs Package Included: 3 × Universal Joint Socket Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.