The Mercer Industries center hole flap wheel features aluminum Oxide grain excellent for all Purpose work with quality results. Resin on resin BOND for minimal loading with heavy X-weight cloth backing. Heat and moisture resistant. Flexible to grind, clean, polish and finish on contoured and Flat surfaces. Mercer Industries is a 3rd generation family owned Company that was built on core Values of quality, performance, delivery, service, and price. Founded in 1968, Mercer Industries offers more than 3,000 products for the flooring, industrial, automotive and welding markets. Mercer is committed to serving its customers and providing quality products. For more information, visit the manufacturer's website. We're here to support you. Please contact our team at info at the manufacturer's website with questions or comments. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the Purpose intended.