Based on this product's specifications, here are some alternatives and similar models
Punch/Number Stamp Set Beta Tools 7 mm digits, model 100070K0, metal marking punches
Summary description:
Beta Tools punch/number stamp set with 7 mm digit size (model 100070K0). Consists of metal marking punches for stamping numerals into metal, plastic or other materials where permanent identification is needed. Suitable for shop, workshop or maintenance use to mark parts, tools, serial numbers and production batches with clear 7 mm high digits.