White Polishing Points formulated from extremely fine (400 grit) aluminum-oxide. A hard wheel that is excellent for polishing hard surfaces such as ceramics, glass, metals, or porcelain. Ideal for polishing intricate subgates on plastic injection molds. Leaves a high finish. Available on 3/32" shanks only. 1/4'' dia. x 1/8'' long, on 3/32" shank.