Feature:1. SPECIFICATIONS: The chuck connection specification is 3 or 8-24UNF, clamping range is 0.8-10mm (1 or 32-3 or 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 ChuckMaterial: Aluminum Alloy, AlloyChuck Diameter: Approx. 41mm or 1.6inChuck Length: Approx. 55mm or 2.2inConnection Type: 3 or 8-24UNFClamping Range: 0.8-10mm (1 or 32-3 or 8in).Package List:1 x Drill Chuck