1、High‑quality brass chuck can be used with other rotating tools. 2、Made of brass material, heat treated ,with high hardness and durable. 3、Wide range of uses.Apply to installation drill, electric grinding, hanging mill and so on. 4、Compact and lightweight, easy to store and use. 5、4 different size with small volume, meet your different needs. Feature: High quality brass collets to fit, other rotary tools, pin vises Compatible with most rotary tools used in hardware, hobby, home etc Specifications: Clamping Diameter :1mm 1.5mm 2.35mm 3.2mm Color: Gold Chucks Model Material:Brass 1MM Clip range 0.6-1.2MM 1.6MM Clip range 1.3-1.8MM 2.35MM Clip range 2.0-2.5MM 3.2MM Clip range 3.0-3.2MM Package included: 1x 4pcs Brass Collet(size including 1mm/1.5mm/2.35mm/3.2mm)