CRACK REPAIR - Use wet or dry for cutting, routing and cleaning cracks in concrete, asphalt, side walks, garage floors, drive ways or other building surfaces. PREMIUM DIAMOND SEGMENTS - Made with higher levels of diamond concentration Ripper Pro Crack Chasers deliver high cutting performance and long life at an affordable price. LASER-WELDED - Segments use advanced laser-welding process to bond to the steel core to make a durable and long lasting blade. SPECIFICATIONS - 7" X .250" wide with a DM-7/8"-5/8" arbor hole. Use on hand-held grinders or circular saws. 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. CRACK REPAIR - Use wet or dry for cutting, routing and cleaning cracks in concrete, asphalt, side walks, garage floors, drive ways or other building surfaces. PREMIUM DIAMOND SEGMENTS - Made with higher levels of diamond concentration Ripper Pro Crack Chasers deliver high cutting performance and long life at an affordable price. LASER-WELDED - Segments use advanced laser-welding process to bond to the steel core to make a durable and long lasting blade. SPECIFICATIONS - 7" X .250" wide with a DM-7/8"-5/8" arbor hole. Use on hand-held grinders or circular saws. 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.