Tiger Zirc UltraCut 4.5 inch 1 millimeter type 1 cutting wheels deliver unmatched cutting performance and toughness when cutting steel and other thin metal material. Proprietary SOLID CORE technology increases density of the wheels, resulting in longer life, reduced friction, and superior stability. From the first cut, operators will experience lightning fast, smooth cutting, and exceptional control for clean, precise cuts on thin sheet metal, profiles, and small diameter rods with a right angle grinder. UltraCUT 1MM cutting wheels deliver lightning fast, super smooth, clean cuts. Thin cutting wheels deliver accurate, clean cuts. Used with die grinder and right angle air die grinder. . .