Diamond grit edged hole saws have diamond coated cutting edge permanently bonded to a tough steel body providing the necessary clearance for cutting at high speeds.
They will cut rapidly through reinforced plastics, germanium, asbestos /substitutes and other abrasives that you may not be able to cut with carbide.
It will produce clean holes and have a long cutting life. Wet cutting is strongly recommended.
Max cutting depth is 39mm.