These tools turn your corded and cordless drill into a grinderfor surface preconditioning, grinding, sharpening, and removing rust. Easily polish all kinds of knives, metals, handicrafts, jade, scissors, drill bits, chisels, etc., restore their sharpness and color. Brown Corundum Grinder (size 70mm): Suitable for high-strength metal, such as carbon steel, alloy steel, forging iron, hard bronze, etc. Green Chloride Grinder(size 70mm): Suitable for grinding carbide, optical glass, ceramics, and other hard and brittle materials. Easy to Install, Mount the grinder on a conversion rod and then connect it to an electric drill to make grinding more convenient and quick. Fix it on a tabletop with the fixed bracket, which provides better comfort and reduces fatiguefor professional cutting and grinding applications. Compatibility, It is suitable for lithium electric drills and AC electric drills, but NOTfor an electric mill, electric hammer, electric wrench, impact drill. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Adopt precision bearing with good concentricity for more accurate grinding without shaking.The traditional grinder is bulky and not easy to carry, but our grinder is small and portable, suitable for a of work scenarios, such as , shop, garage, etc. Warm Tips: Adjust the pressure plate, put in the electric drill, align the electric drill with the bearing, and then install the screws and nuts to tighten, and finally install the polishing grinder. After the installation is complete, that all screws are fastened and all components are securely connected. The pressure plate and the electric drill should be fitted. Please install them carefully to avoid problems durin. Type:B Colour:As Shown Material:Metal Package Contents: 1 * Holder 1 * grinding wheel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.