Faithfull FAIHSVP43 Varipitch Holesaw 43mm The Faithfull Varipitch Holesaws are manufactured from bi-metal material with hardened teeth made from high speed steel and a variable tooth pitch for fast smooth cutting. Bi-metal holesaws offer increased safety as they will not shatter under load. They are ideal for use on a wide variety of materials including wood^ chipboard^ plywood^ non laminated plastics^ plasterboard and non ferrous metals. Suitable for use in most variable speed power drills. Diameter: 43mm