Hole saw
Hole saws belong to the family of hole cutting tools like drill bits, router bits, conical sheet metal bits and reamers. Holes saws are recommended for wood, wood materials and plasterboard, but also for all kinds of metals. Fitted to a drill a hole saw can be used to make circular cut-outs. Exchangeable, sawblade-like cutters or cores with varying diameters can be arranged inside the hole saw.