Tiger Cut-Off Wheel, Fast and Long Life Super Thin Ultra Cut, 4-1/2 in Wheel Diameter, 1 mm Wheel Thickness, 7/8 in Center Hole, Z60T Grit, Fine Grade, Zirconia Alumina Abrasive, 13300 rpm Maximum, Resin Bond, Applicable Materials: Steel and Stainless Steel, Wheel Type Number: Type 1, Wheel Hardness: T, For Use With: Right Angle Grinders, Yes Reinforced.Weiler’s NEW UltraCut wheels deliver unmatched cutting performance and toughness with a true 1 millimeter thickness. 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.