Tiger Zirc 6 inch type 27 depressed center cutting 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 depressed center provides added clearance when working at a constrained angle. The .045 wheel thickness is ideal for cutting tubes, bar stock, and large cross-sections with a right angle grinder. These wheels are designed for hardcore Metal Fabrication professionals who need a high performance solution when cutting steel, structural steel, and iron.