Broco's Diamond Ripper rescue saw blades are for use with gasoline powered portable "rescue" saws to facilitate cutting of a wide range of materials in a disaster recovery, Urban Search & Rescue, law enforcement forced entry, or military environment. Diamond Ripper blades cut all materials, eliminating the need for carrying and employing separate types of blades for cutting metal, concrete or wood. Mini-Ripper blades are for use with high-speed electric grinders.Construction: Steel core with industrial grade diamonds in a nickel matrix vacuum brazed along the cutting edge segments. Diamond powder is bonded to the face of the core to reduce binding and aid cooling.Available in 12 inches, 14 inches, 16 inches and 4.5 inches (Mini-Ripper) diameters.