Description: Made of chrome vanadium steel for strength, durability, rust and corrosion resistance Attaches tools easily, apply to 1/4", 3/8", and 1/2" drives tools Swivel and joint allows you to work in tight places or on angles Spring-loaded detent balls design, makes it latch onto the tool securely and firmly Fits for various situations, such as car, bike, all kinds of mechanical Maintainance Specification: Material: Chrome Vanadium Steel 1/2 Inch (12.5mm): 74 x 24 x 12.5mm / 2.91 x 0.94 x 0.49in 3/8 Inch (9.5mm): 56 x 19 x 9.5mm / 2.20 x 0.74 x 0.37in 1/4 Inch (6.3mm): 41 x 14 x 6.3mm / 1.61 x 0.55 x 0.24in Package Includes: 1 x 1/2 inch Drive Universal Joint 1 x 3/8 inch Drive Universal Joint 1 x 1/4 inch Drive Universal Joint 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