SUPREME GRADE - Made with supreme grade and extended diamond turbo segments for added cutting and grinding performance, also helps prevent binding. Supreme diamond concentration has the highest amount of diamond in each segment for superior performance on most materials such as Masonry, Concrete, Stone, Granite, Marble & anything similar. WAVE CORE DESIGN - Features a wave design, heat-treated steel core that increases airflow, reduces friction and allows air to be drawn in during cutting, keeping the blade cooler. This maximizes blade life while virtually eliminating warping. WET/DRY - Designed to withstand the demands of dry cutting or grinding while delivering excellent results and finishes. Use water when possible can for improved performance. SPECIFICATIONS - 7" diameter X .095 thick with a 7/8"-Diamond Knockout arbor for circular saws and angle grinders. Included is a 5/8" bushing for adapting to other circular saws and grinders. The maximum safe operating speed is 8,730 RPM. LIFETIME WARRANTY - 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.