High-quality chuck: the chuck can firmly clamp the drill bit, not easy to loosen, durable, very suitable for long hours of work, long service life; Wide range of applications: the drill chuck has a wide range of clamping sizes, 0.04-0.51 inch, connection size 1/2-20 UNF, suitable for various drill bits; Reasonable design: it fits is a keyless chuck, the keyless self-tightening design is more ergonomic; Easy to use: the hand electric drill chuck is easy to disassemble and assemble, saving labor. labor is more convenient and no complicated operation is required; Feature: 1. The chuck can firmly clamp the drill bit and is durable 2. This drill chuck is suitable for long-time work and has a long service life 3. The range of 2~13mm/0.04~0.51inclamp is suitable for various drill bits 4. Keyless self-tightening design is more ergonomic 5. Manual chuck is easy to assemble and disassemble, which is labor-saving and more convenient Specification: Diameter: 43mm/1.69in Length: 72.5mm/2.85inch Connection Size: 1/2-20UNF Clamp Range: 2~13mm/0.04~0.51 in packing list: 1 x drill chuck