Product Description: "TROXELL" Diamond hole saws are designed to bore round holes in various types of ceramic, marble, granite, or porcelain for plumbing or electrical fixtures. Includes: 38mm, 50mm, 60mm, 67mm, 73mm, 83mm, 1 1/2", 2", 2 3/8", 2 11/16", 2 15/16", 3 5/16", and Arbor (21779). Cutting Depth 28mm or 1 1/8"