1 or 2" Keyless Drill Chuck 1 or 2" x 20 Mount, Keyless Hand Drill Chuck, Self-Tightening Multi-Function Chuck,KoleZy p202411261037 The chuck can hold the drill bit firmly and sturdy, not easy to loosen. Durable and has a long service life, suitable for long-time work. Easy to install and disassemble, more convenient and more economical. Wide range of collet sizes from 2 to 13 mm, suitable for many types of drill bits. The Keyless and self-tightening type design is more in line with human engineering. Features: The chuck can hold the drill bit firmly and sturdy, not easy to loosen. Durable and has a long service life, suitable for long-time work. Easy to install and disassemble, more convenient and more labor-saving. Wide range of collet sizes from 2 to 13 mm, suitable for many types of drill bits. The keyless and self-tightening type design is more in line with human engineering. Specification: Diameter: 43 mm or 1.69 in Length: 58mm or 2.28in Connection size: 1 or 2-20UNF Clamping range: 2-13mm or 0.04-0.51in Package List: 1 x Drill Chuck