Specification: Diameter: 43mm, Length: 71mm, Link Size: 1/2-20UNF, Clamping Range: 2~13mm/0.04~0.51in Wide Range of Sizes: Wide range of collet sizes from 2mm to 13mm, suitable for many types of drill bits Good Workmanship: Keyless and self-tightening design is more ergonomic. The multi-purpose keyless drill chuck can hold the drill bit firmly and securely, not easy to loosen Easy to Install and Disassemble: This multi-purpose keyless drill chuck is easy to install and disassemble, making it easier and less laborious Durable: The drill chuck is durable and has a long service life, suitable for long hours of work < p>Feature: The chuck can hold the drill bit firmly and securely, not easy to lose. Durable and has a long service life, suitable for long time working. Easy to install and disassemble, more convenient and labor-saving. Wide range of collet sizes from 2mm to 13mm, suitable for many types of drill bits. The keyless and self-tightening type design is more in line with human engineering. Self-adjusting portabrocas para mltiples propsitos Specification: < p>Connection size: 1 /2-20UNF Clamping Range: 2~13mm/0.04~0.51inch Package List: 1 x Chuck Portabrocas self-adjusting for multiple options Diameter: 43 mm/1.69 in Length: 58 mm/2.28 inch Portabrocas self-adjusting for multiple options 1/ 2-20UNF Montaje 1~13mm Wide range of sizes Wide range of accessory sizes, ranging from 1-13mm, suitable for a wide range of drills