A0054 Flexovit High Performance Grinding Wheels which offer High Productivity, Versability, and Durability. A30S - Fast Grind offers Agressive grinding with a good wheel life. Ideal for most metals, including stainless and other hard alloys. An excellent "all purpose" spec. Grinding Wheels - USA Abrasives 5"x1/4"x5/8-11 Flexovit Fast Grind Depressed Center Grinding Wheel for Metal, Stainless. Flexovit Industrial Abrasive Wheels. Made in the USA by Flexovit High Quality Industrial Abrasive Products. Sold in box quantities of 10.