PREMIUM TILE DIAMOND BLADE - Made with higher levels of diamond compared to other diamond blades for professional use. Engineered to provide smooth finishes on porcelain, ceramic, marble, granite, and similar materials..CHIP-FREE CUTTING - Continuous rim design formulated with high-grade diamonds allows for smooth chip-free cutting..PROFESSIONAL-GRADE QUALITY - Piranha blades are ideal for professionals who need reliable cutting for every job while still being a great value..SPECIFICATIONS - 3-Pack of 7" diameter X .060 wide X DM-7/8" arbor. Includes preinstalled 5/8" bushing. Will fit just about any hand-held angle grinder, circular saw, tile saw or trim saw. Max safe rpm is 8,730. Wet or dry cutting. If blade becomes dull, we recommend running the blade through a dressing stone or paver to expose new diamonds..LIFETIME WARRANTY & FREE RETURN SHIPPING - All Delta Diamond Products, Inc Diamond Blades, Coring Bits, Hole Saws and Grinding Wheels include a lifetime warranty against warping, cracking and material defects. If any diamond tool (being used under its intended use with at least 50% wear left) fails to cut or work properly, or if the bond between the diamond segment and the steel core becomes separated at any time, the diamond tool will be replaced free of charge.