"99 SERIES" CUTTING TILE BLADEThis 4" economy grade general purpose wet cutting continuous rim diamond blade is designed for fast cutting with minimal amounts of chips. The steel core is heat treated to accommodate heat build up from friction of the cut. The blade comes with a 20mm to 5/8 In. arbor so it can be used with a variety of grinders and handheld saws.Highligths:Multi-Purpose Dry and Wet Cutting Blade. 5/8" ROUND ARBOR. 0.06" edge thickness. With 20MM Adaptor. 4" Dia. Max RPM=15,000. for use with tile saws, hand held saws, portable saws and cordless saws.