[Uses] Use with electric mini routers/routers and flexible shafts. Features: Can be used for deburring metal and for polishing drills and scissors. Can be used for various grinding processes, such as fixing molds, removing rust, precious metal processing, crafts, grooving, welding finishes, etc. Compatible models can be used with mini routers and electric drills from any manufacturer that supports 0.09 inch (2.35 mm) axis. Maximum compatible rotation: 20.000 min (times/minute). Caution: When working, please make sure to use safety equipment such as safety glasses, and keep your hands and face away from rotating objects. Do not use for anything other than the intended purpose. Please check if there are any abnormalities such as deformation, breakage, or curving. Close to the zipper as possible and tighten tightly to eliminate wick shaking. If the installation is loose, it is very dangerous to slip during rotation. When attaching the bits to a mini router, please ensure that the shaft protrusion (overhang) or less is 0.5 inches (13 mm). Please carefully read the manufacturers instructions for the mini router or router you are using and observe the warnings and warnings from each manufacturer. Do not use near children. Keep out of reach of small children.