Tiger® Zirc 7 in type 27 depressed center Grinding Wheel are designed to deliver exceptional durability and a fast cut rate for performance you can count on. The bond is formulated to eliminate uneven edge breakage or chipping on the wheel edge. This technology advancement improve operator safety by reducing high energy debris during the grinding process, eliminate the need to dress the wheel to regain a workable edge and provide longer wheel life and increased consistency. Sharp and durable zirconia alumina abrasive grain cut smoothly and hold up in the most challenging foundry cleaning room application. The flat profile of the wheel in combination with a depressed center allow for a wide range of grinding angle (0 to 45). These 1/4 in Grinding Wheel are ideal for heavy stock removal, removing crack and surface imperfection, blending parting line, removing flashing on edge of casting with a right angle grinder. Tiger® Zirc, a high performance abrasive solution for foundries. Tiger® Zirc Grinding Wheel, Fast Cut Long Life High Performance, 7 in Wheel Diameter, 1/4 in Wheel, Hub Connector, 24 Grit, Z30T Grade, Wheel Type Number: Type 27, 8500 RPM Maximum, Resin Bond, Applicable Materials: Armored Steel/Cast Iron/Cast Steel/Ductile Iron/High Nickel Alloy/Inconel/Stainless Steel/Steel/Titanium/Tool Steel, 5/8-11 UNC Center Hole Thread, Wheel Hardness: T, Black Wheel, Reinforced: Yes, Specifications Met: ANSI B7.1