Features 1、[FIRM STRUCTURE] The drill chuck is of keyless and self tightening design, the chuck can tightly fix the drill bit and is not easy to loosen. 2、[CLAMPING RANGE] The drill chuck clamping range is 2-13mm, suitable for a variety of drill bits, and has a wide range of applications. 3、[HIGH STABILITY] The drill chuck design conforms to ergonomics, which can quickly switch tasks and keep movement, with good stability. 4、[METAL MATERIAL] The self tightening chuck is made of excellent metal, with high hardness, wear resistance and impact resistance. 5、[APPLICABLE SCENES] The drill chuck is usually fixed on the electric hand drill or bench drill, and widely used in machine tool processing. Specification Item Type: Drill Chuck Chuck Diameter: Approx. 43mm / 1.7in Connection Size: 1/2-20UNF Clamping Range: Approx. 2-13mm / 0.08-0.51in Package List 1 x Drill Chuck