Features: The package contains 25 cutting wheel discs diameter is 22mm, with 5 mandrel rotating tools & screwdriver. It can cut accurately and quickly.breathing holes is for reducing heat and removing debris, perfect for making slots and slits. These metal cutting wheel for drills are suitable for most rotary and pneumatic tools, tile cutters, electric grinders and most rotary tools. Rotary tool cutting disc for metal is used to cut gems, glass, ceramic tiles, cemented carbide, rocks, etc. Suitable for wood-, gypsum board, plastic-.ect.It is for ideal for cutting, grooving and DIY. But not recommended for hard metal. Before use, please make sure that the screws of the spindle have been tightened. When you use our cutting wheel set for cutting, use water to cool down and reduce dust to achieve the best results. At the same for time, take care of for protection, such as gloves and goggles. Specifications: Material: plastomer+metal Package Includes: 1 Set Diamond Cutting Disc Set note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.