Premium drill chuck: the drill chuck can hold the drill bit tightly, not easy to loosen, durable and sturdy to use. It is quite suitable for long time work and has a long service life; Wide application: this drill chuck has a wide range of clamping sizes from 0.04~0.51in, connection size 1/2-20UNF, it is suitable for many kinds of drill bits;< /p> Reasonable design: it is a keyless self-tightening drill chuck; Keyless and self-tightening type design is more in line with human engineering; Easy to use: the hand dill chuck is easy to install and disassemble, save effort and more convenient , no complex operation is required; Intimate after-sales service: Please feel free to email us if you have any problem with the item; We will do our best to give you a satisfactory answer within 24 hours Features: 1. The chuck can hold the bit firmly, durable and sturdy in use 2. This drill chuck is suitable for long time work and has a long service life 3. It is suitable for many kinds of drill bits with its 2~13mm/0.04~0.51inclamprange 4. Keyless and self-tightening type design is more in line with human engineering 5. The hand chuck is easy to install and disassemble, save effort and more convenient Specification: Diameter: 43mm/1.69in Length: 58mm/2.28inch Connection Size: 1/2-20UNF Clamping Range: 2~13mm/0, 04~0.51 inch Package List: 1 x Drill Chuck