1. Multisize chuckThe electric grinder comes with a 3jaw chuck that can accommodate a variety of tool sizes from 3 mm to 3.2 mm. It versatility and comfort when performing various grinding tasks without the need for additional chucks or tools. 2. Effortless tool change: With the knurled grip design, this drill chuck allows for effortless tool changes. No wrench or key is required, making the process quick and hassle. The grip for securing or releasing the tool saves you time and effort. 3. Rustproof: Made of highcarbon steel and treated with a rustproof black oxide finish, this drill chuck is built to last. It durability and longevity even in demanding work environments, providing reliable performance and resistance. 4. Easy to use: This drill chuck is designed for userfriendliness, ensuring easy handling. Attach it to your electric grinder, and you can start working immediately. The userfriendly design enhances efficiency and productivity, making it suitable for both professionals and DIY enthusiasts.