Specification: Diameter: 43mm, Length: 71mm, Connection Size: 1/2-20UNF, Clamping Range: 2–13mm (0.08–0.51in). Wide range of collet sizes from 2mm to 13mm, suitable for various types of drill bits. Good workmanship: Keyless and self-tightening design offers improved ergonomics. The multipurpose keyless drill chuck securely holds drill bits and resists loosening during operation. Easy to install and disassemble, allowing for quick and convenient bit changes. Durable construction ensures long service life, ideal for extended use. Feature: Securely grips drill bits without slipping. Designed for durability and prolonged operation. Simple installation and removal for increased efficiency. Offers a broad clamping range from 2mm to 13mm, compatible with a wide variety of drill bits. Keyless, self-tightening mechanism provides user-friendly performance with enhanced control. Specification: Connection Size: 1/2-20UNF, Clamping Range: 2–13mm (0.08–0.51in). Package List: 1 x Keyless Drill Chuck Diameter: 43mm (1.69in), Length: 58mm (2.28in). Multipurpose keyless chuck with 1/2-20UNF thread. Clamping range: 1–13mm. Wide size compatibility supports use with multiple drill bit types.