Tiger Zirc 4.5 inch type 27 combo 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. Combination wheels offer flexibility and efficiency when switching between cutting and grinding with an angle grinder. The open arbor offers a cost-effective mounting option when using adapting nuts. These combo wheels are designed for hardcore Metal Fabrication professionals who need a high performance solution when cutting and grinding steel, structural steel, and iron.