For marking metals and other solid materials. Produced from high grade quality steel and heat treated to give accurate impressions. All too often these days tools are stolen, sometimes entire workshops are cleared. We are frequently asked to quote for insurance claims when a workman's whole collection has gone missing in the middle of the night. According to the police most of these tools, if recovered at all, are totally unidentifiable. They recommend at least marking tools with your post code, if not your name and address. Larger machines and power tools should also be marked and a log kept of all model and serial numbers. Workshop number and letter punches are supplied in sets in a plastic box. Letter punches contain 27 characters A to Z and &. The number punch sets contain nine numbers 0 to 9 (inverting 6 to get a 9).