Bisco Tool Supply sells Grinding Wheels. These USA Abrasives 4"x1/4"x5/8" are Flexovit Free Grind Depressed Center Grinding Disc for Stainless Steel and Alloy Metals. These Wheels Provides a Smooth and Fast Grind. Flexovit Industrial Abrasive Discs. Made in the USA by Flexovit High Quality Industrial Abrasive Products. Sold in box quantities of 25.