Description: High quality: This product is made from High-quality chrome vanadium steel CR-V. Durable: Quenching heat treatment to the whole makes the hardness high, the product is durable. Beautiful: The surface of the product has been chrome plated so that it is rust proof and beautiful. Easy to use: The product is suitable for all the hexagonal side handle four square hole groove, the sleeve can be conversed to each other freely, easy to use. Widely used: The product is applied to repair, car modification, wrench socket transformation, to make leverages can turn to any direction. it is widely applied to the vehical transmission. Specification: Material: Chrome vanadium steel CR-V. Hardness: 60HRC. 1/2" one size: Approx. 75x12.5x12.5mm / 2.95x0.49x0.49inch 3/8" one size: Approx.56x10x10mm / 2.2x0.39x0.39inch 1/4" one size: Approx. 43x6.3x6.3mm / 1.69x0.25x0.25inch Package Includes: 3 Pieces Universal Joint Note: The color may be different for different display, pls understand Pls check the pictures for more details, thank you