The Tolsen 25097 is a 9-piece number punch set designed for clear and permanent marking on materials such as metal, wood, or leather. Each punch features a 6mm diameter, allowing you to engrave legible identifiers or serial numbers into your workpieces with precision. Crafted from heat-treated carbon tool steel, these stamps are hardened to withstand repeated impacts without deforming. The sandblasted surface provides a clean finish, while the entire set comes organized in a durable plastic box that keeps the pieces secure and easy to find in a busy workshop.