Tiger® Zirc 5 in type 27 depressed center Cutting Wheel cut faster and last longer so you get proven productivity at an exceptional total cost. The self-sharpening zirconia alumina grain retain a high cut rate throughout the life of the wheel while a hard bond delivers long wheel life for heavy duty application. The flat profile of the wheel in combination with depressed center allow for a wide range of grinding angle (0 to 45). The 0.045 in wheel thickness is ideal for cutting tube, bar stock and large cross section with a right angle grinder. 5/8-11 UNC nutted metal hub allow for quick spin-on, spin-off changeover and eliminate cross threading or sticking to spindle due to heat build up. These wheel are designed for hardcore metal fabrication professional who need a high performance solution when cutting steel, structural steel and iron.