Broco Mini Diamond Rescue Saw Blades are available in 4.5″ and 7″ diameters. Designed for use with battery grinders for cutting chains, locks, hinges and hasps without the noise of a gasoline enginer powered saw. Mini Diamond Rescue Blades also have diamond electroplate vacuum brazed edges, and fit tools with 5/8″ and 7/8″ or 22mm arbors. Maximum RPM rating is 13,300.