The CYCLONE VACUUM BRAZED WHEELS by Diamax are the fastest way to remove material after cutting out sink holes with a diamond blade, or to shape a radius on the outside edge. Vacuum brazed, available in coarse #30, medium #50/60 and fine #100. 5/8″-11 thread with a center water feed. Designed for use on engineered stone, granite, marble, and ultra-compact materials. SIZE: 2″ x 2″. MAX RPM: 3,000 – 4,000.