Description:1. Made of High Speed Steel, coated with diamond particles, suitable for cutting metals, stone, ceramics, porcelain and ceramic tiles, ect. Suitable for most rotary and air tools.2. Diamond cutting wheel may become very hot during cutting. Adding water can extend the life of the Diamond Cutting Wheel. It is suggested that wearing gloves and goggles when using diamond cutting wheel.3. Coated with fine diamond particles for working with hard materials. High Speed Steel with good hardness, wear resistance and good impact resistance. The diamond coating adds durability and longevity, while producing smooth and fine cuts. The hole is for reducing heat and removing debris, perfect for making slots and slits.4. The cutting wheel is separated from the connecting rod, easy to change the cutting wheel when it is worn out.