Why choose high-quality brass collet and metal nuts? Most of the collets used in the market are made of aluminum alloy. This material is soft and easy to wear and tear, so we use a better quality brass material. For plastic nuts, they break during use, and the all-metal material solves this quality problem very well. The included wrench helps tighten the metal nut. Wide Application: Quick-change chucks are ideal for light-duty accessories including drill bits, sanding drums, polishing wheels, wire & bristle brushes, and cut-off wheels. Compatible with Universal rotary tools. Keyless Chuck: A built-in spring ensures better attachment and prevents accessories from falling or flying out during use, which provides excellent stability. The quick-change chuck can hold various accessories from 1/32inch to 1/8inch shank sizes. The keyless quick-change chuck allows you to quickly and easily change the attachment on your Universal rotary tool without changing collets. This is ideal when the application requires multiple attachment changes. Metal Nut: Made of metal material, sturdy and stable. The plastic nut on the market often break during use, but the all-metal nut solve this quality problem very well. They are more and than plastic materials., Weight: 0.08377565956 pounds, Manufacturer: Hipzeepo