The drill locator is made of high-grade plastic material, drill bit and milling burrs are made of high-quality steel, they are all very sturdy and durable to use Our drill carving locator is very easy to install with the rotating tool , no need any special tools Large window provides excellent visibility for better control of your electrical drill With the electric grinder tool, there are screw patterns on it, you can directly spin the electric grinder on the holder. Has wide applicability, can be installed in electric grinder to fix drills, milling cutters, etc.