Cuts through any machinable material including, cast iron, tool & stainless steel, brass, bronze, aluminium, plastics & wood. This bonded construction means production can be uninterrupted. These hole saws contribute to user safety on the job. Safe - Flex Hole Saws are used for preparing installation holes through floors & partitions. Saws are widely used in the production & maintenance operations, & in the electrical & building trades. Arbors available that readily fit machine tools & portable drills. All sizes have 6 teeth / inch with alternate set. SPECIFICATION: Max. cutting depth: 38 mm (11/2). Explanatory notes: Pipe entrance is the diameter of the hole through which piping of a given size will pass during installation or repair. Pipe size is designated by inside diameter. Pipe Taps listed are for threading holes prepared by hole sawing to receive threaded pipe.