Gemini® Type 27 Grinding and Cutting Wheel, 4-1/2 in dia x 1/4 in T x 7/8 in Arbor Hole, AOHigh performance bond and wheel hardness are designed for fast cut and up to 60% more life and metal removed per wheel Upgraded with a new premium aluminum oxide grain for 15% faster cut rate Good choice for grinding 400 series stainless and hard and soft carbon steel applications including heavy stock removal, weld repairs, flashing, multi pass welding for pipefitting, notching and any job that requires a quick turnaround. Specifications Abrasive