The diameter of the chuck is 43mm/1.69inch, the length is 58mm/2.28inch, the connection size is 1/2-20UNF, and the clamping range is 2~13mm / 0.04~0.51inch. Please confirm whether your hand drill is compatible with the drill chuck before purchasing. Self-tightening chuck: durable, long service life, suitable for long-term work. The chuck can firmly fix the drill bit and is not easy to loosen. Compared with traditional drill chucks, this keyless drill chuck is more convenient to install and remove Universal Multi-Quick Change Keyless Chucks 2~13MM Chuck sizes range from 2 to 13 mm, suitable for many types of drills. Easy to use, your industrial accessory of choice The keyless hand drill chuck is easy to install and disassemble, more convenient and more economical. The keyless self-tightening design is more ergonomic. Suitable for many types of drills. which can meet your needs. The hand drill chuck can firmly fix the drill bit and is not easy to loosen. You can use this product effortlessly. You don't need complicated programs to use it. WUZHOU