Cardide hole saws GP GRIT
The GP GRIT hole saws ha",e a tough steel body with multiple carbide grits permanently bonded to the teeth. very efficient at high speeds, they prevent binding action and cut smooth holes.
this hole saws will cut ceramics, glass resins, asbestos and other abrasive materials that would wear out the conventional saws.
cutting depth is 38 mm (1 1/2 inch) and they are available from diam. 14 (9/16") to 152 mm (6").