Features 1、1/4/" keyless chuck. 2、Convert 1/4/" hex shank screwdriver into a drill. 3、It will hold drill bits and accessories up to 1/4/" in diameter. 4、Use this chuck to convert cordless screwdriver into a drill or grinder. 5、Driver shank is 1/4/" hex. Specification The 1/4" hex shank adapter can convert cordless screwdriver up to 1/4" in diameter into a drill or grinder. Features: 1/4" keyless chuck. Convert 1/4" hex shank screwdriver into a drill. It will hold drill bits and accessories up to 1/4" in diameter. Use this chuck to convert cordless screwdriver into a drill or grinder. Driver shank is 1/4" hex. Specifications: Material: Alloy Color: Black Item Length: 72mm / 2.83in Clamping Range: 0.3-6mm / 0.01-0.24in Top Diameter: 6.35mm / 0.25in Package Weight: 78g / 2.75ounces Package Size: 75 * 23 * 23mm / 2.95 * 0.91 * 0.91in Packing List: 1 * Chuck Adapter Package List 1 * Chuck Adapter