Tiger Zirc 5 inch type 27 grinding wheels cut faster and last longer so you get proven productivity at an exceptional total cost. The self-sharpening zirconia alumina grains retain a high cut rate throughout the life of the wheel while a hard bond delivers long wheel life for heavy duty applications. The flat profile with depressed center allows for a wide range of grinding angles (0-45∞). 1/4" wheel thickness is ideal for heavy stock removal, scale removal, weld removal, weld blending, edge beveling and torch-cut softening with a right angle grinder. The 7/8" open arbor offers a cost-effective mounting option when using adapting nuts. These wheels are designed for hardcore Metal Fabrication professionals who need a high performance solution when grinding steel, structural steel, and iron.