Feature 1SPECIFICATIONS: The chuck connection specification is 3/8-24UNF, clamping range is 0.8-10mm (1/32-3/8in), and has a wide use range. 2ERGONOMIC DESIGN: Keyless and self tightening design is more ergonomic, the chuck can firmly fix the drill bit, and not easy to loosen. 3STANDARD SIZE: The chuck has standard size, suitable for a variety of drill bits, can quickly switch tasks and keep working movement. 4METAL STRUCTURE: The drill chuck uses aluminum alloy matte case, which is comfortable to touch, wear resistant and corrosion resistant. 5EASY INSTALLATION: The metal drill chuck has compact size, which is easy to install and disassemble, and suitable for long term work.SpecificationItem Type: Drill ChuckMaterial: Aluminum Alloy, AlloyChuck Diameter: Approx. 41mm / 1.6inChuck Length: Approx. 55mm / 2.2inConnection Type: 3/8-24UNFClamping Range: 0.8-10mm (1/32-3/8in) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Drill Chuck