Application: Compatible with most power rotary tools. Designed for Dremel WEN ect. rotary tools. Turn your dremel or other rotary tool into high-speed cut-off saw & grinding machine High Quality And Durable: The alumi/num oxide cut off discs are thin and sharp. It is completely coated with fine diamond particles Size: The cutting discs diameter: 22mm; Thickness: 0.6mm; Mandrel diameter: 3.0mm; Screwdriver: 98mm High Efficiency: All discs have breathing holes which is designed for heat reduction and removal of debris while using. With high cutting efficiency, high durability, stable quality, etc Attention: For your safety, please must wear gloves and goggles and be care around spark when using mandrel diamond cutting tools. It may become very hot when cutting, add some water to keep it cool Attention: For your safety, please must wear gloves and goggles and be care around spark when using mandrel diamond cutting tools. It may become very hot when cutting, add some water to keep it cool