General description The Keyless Drill Chuck is a high-quality, multi-purpose self-tightening chuck designed for hand drills. It securely clamps drill bits, ensuring they do not loosen during operation. This chuck is built for durability, making it ideal for extended use. Technical specifications Diameter: 43mm / 1.69in Length: 72.5mm / 2.85in Connection Size: 1/2-20UNF Clamp Range: 2~13mm / 0.04~0.51in Usage Suitable for various drill bits due to its wide clamping size range. Easy to assemble and disassemble, making it convenient for users. Other information Packing list: 1 x drill chuck