The CYCLONE ELECTROPLATED BLADE by Diamax is designed for use on Marble, porcelain/tile, and ultra-compact surfacesd with an angle grinder or hand saw. Use WET or DRY. Thin core design allows for sharp, clean cuts in all marble. Secret electroplating process separates this blades performance from all others. For straight cuts only. Size: 7". Arbor: 5/8″ – DKO. Max RPM: 8.730.