Malco HF18 Carbide Tipped Hole Saw, 3-5/8" Easily cut thick or layered building materials including wood, wall tile, fiberglass, plastic, even fiber-cement siding These carbide tipped hole saws feature a quick-connect/quick-release arbor design and quick change pilot drill Set up in 3 easy steps Easy cutting in uneven surfaces. Generous 2-1/4-inch (57 mm) hole saw depth