Hole Cutter Punch Screw is ideal for thin layered materials up to 4.0mm. They can deliver a smooth clean circular hole cut into the surface material giving a burr-free smooth circular hole. Suitable for Sheet Steel, Stainless Steel Sheets, Non-Ferrous Metals, Light Metals and Plastics. Used in the plumbing industry for sinks to produce a plug hole or to allow a tap/other fitting to be installed. Used in all trades including electrical and construction.