Flexovit A1226H Bisco Tool Supply Sells Flexovit USA Made Depressed Center Type 27 Grinding Wheels for Metal and Stainless Steel. High Performance Grinding Wheels offer High Productivity, Versability, and Durability. A24/30T Heavy Duty offers Extremely rugged and hardworking discs that are ideal for tough applications - beveling, edge, or flame cut grinding. Grinding Discs - USA Abrasives 4-1/2"x1/4"x5/8-11 Flexovit Heavy Duty Depressed Center Grinding Disc for Metal, Stainless. Flexovit Industrial Abrasive Discs. Made in the USA by Flexovit High Quality Industrial Abrasive Products. Sold in box quantities of 10.