Based on this product's specifications, here are some alternatives and similar models
Punch Letter Set 12 mm, Beta Tools BE 10112000 — letter stamps for marking metal
Summary description:
Letter punch set from Beta Tools (model BE 10112000) contains 12 mm character stamps designed for marking letters on metal surfaces. The set provides durable handheld punches for clear, permanent identification of parts, tools or components. Suitable for workshops, maintenance and manufacturing where direct, mechanical marking on steel or other metals is required.