Features: 1. Portable size, light weight, pencil-shaped design, convenient to use with one hand. 2. Speed control throttle easy to switch on and off, you can change the speed to satisfy different projects. 3. High speed 56,000 rpm in free to finish your project fast, save your time. 4. Filter with air connector supplies clean air to make pencil grinder works well and project more perfect. 5. Flexible and long nylon hose with protective slip-on shield provide lower noise and working more conveniently. 6. Includes two flat wrenches and 2pc grinding stone bits, also quick connector and one extra 1/8-in collet. Specification: - Collet size: 1/8 in; - Free speed: 56,000 rpm; - Airlet size: 1/4 in; - Length of air hose: 45.28"; What's in box - 1 x PC Micro Air Grinder - 1 x PC 45.28 "air hoses - 1 x PC Filter - 2 x PC flat Wrenches - 1 x PC 1/4" FNPT connector - 2 x PC Grinding stone bits - 30 x PC Extra mounted stones - 2 x PC Wool Grinding Heads - 2 x PC Ceramic Grinding Heads