STAINLESS STEEL 57 HRCTool for tracing and recovering panel lines on models. Its great ease of use allows us to engrave on resin, PVC, plastic, wood, etc.Exclusive special design for easy panel dragging. The tool is made of hardened steel 57 HRC.USE: It is used to engrave the surface of the workpiece by applying a little pressure on the tool to create a shallow groove. It can be used to create new lines or restore lines that have been damaged/removed during the sanding process. It is recommended that a slightly flexible metal ruler or hard plastic tape be used as a guide to ensure accurate routing.