These arbor mounted foam pads have 1/4" shanks and are available in 50mm(2") and 75mm(3") diameters. The velcro-style mounted discs, which are available in a full range of grits, have many applications and are particularly suited to sanding and finishing turned bowls. The foam conforms to the curve and the contra rotations of the lathe and drill mounted pad eliminate swirl marks to produce a fine finish.