Anytime Tools 5 diamond dust hole saw for tile/glass/marble holesaw 3/4", 1", 1-3/16", 1-3/8", 1-5/8" Sizes: 3/4", 1", 1-3/16", 1-3/8", 1-5/8" Excellent results in glass, marble, slate, and tile. Segmented design works better and lasts longer The diamond coating on these saws give superior performance and life Note: To prolong the life of these bits, use on a low speed with coolant (water/oil)