This Finger Bit is for CNC machines and requires wet cutting. (Basically all CNC machines)
It is rated from the manufacturer for Granite and Engineered Stone.
 
Common uses are for sink cutouts and for making round cuts such as corner and edges
 
Requires a 1/2" Gas Arbor
Max RPM: 4500-5500
 
Two tip widths available: 40 L or 50L, both have a tip thickness set at 3.8mm