Rapid Strip non-woven wheel is 4-1/2 in. diameter x 5/8 in. hole (11mm). The Rapid Strip wheel is made for right angle grinders/sanders to strip away rust, corrosion, paint and epoxy. Wheels conform to edges and contours as well as uneven surfaces without gouging. Rapid Strip wheels are perfect for grinding down Rapid Refloor patches on polished concrete floors allowing the user to avoid dropping down to a transitional or metal grinding wheels. With a speed lock hub no tools are needed to put the Rapid Strip wheel on or take it off.