Norton 66252843326 4-1/2"X1/4"X5/8-11 TYPE27 NORZON PLUS WHEEL NorZon Plus fast cut wheels are the best choice for steel, stainless steel, and exotic metals providing the highest cut rate of any wheels on the market Our highest content of patented Norton SG ceramic alumina grain in a free-cutting bond matrix allows this wheel to cut dramatically freer, initially, and maintain that same cut rate throughout the life of the wheel Reinforced for the most aggressive foundry applications Highest productivity and lowest total cost All wheels are fully speed tested and comply with ANSI standards