Feature: 1. SPECIFICATIONS: The chuck connection specification is 3/8-24UNF, clamping range is 0.8-10mm (1/32-3/8in), and has a wide use range. 2. ERGONOMIC DESIGN: Keyless and self tightening design is more ergonomic, the chuck can firmly fix the drill bit, and not easy to loosen. 3. STANDARD SIZE: The chuck has standard size, suitable for a variety of drill bits, can quickly switch tasks and keep working movement. 4. METAL STRUCTURE: The drill chuck uses aluminum alloy matte case, which is comfortable to touch, wear resistant and corrosion resistant. 5. EASY INSTALLATION: The metal drill chuck has compact size, which is easy to install and disassemble, and suitable for long term work. Specification: Item Type: Drill Chuck Material: Aluminum Alloy, Alloy Chuck Diameter: Approx. 41mm / 1.6in Chuck Length: Approx. 55mm / 2.2in Connection Type: 3/8-24UNF Clamping Range: 0.8-10mm (1/32-3/8in) . Package List: 1 x Drill Chuck