Ever wondered how letters get carved into metal? 📽️: metal_marking_machine / IG | Interesting Engineering

In the era before computers and printers existed, engineers could produce lettering that looked as neat as if it had been printed. This was achieved with an engineering lettering template ruler, which is covered with cut-out slots for various letters and numbers. When writing, engineers simply insert a special technical pen into the appropriate slot and gently guide it along the ruler’s track, instantly transferring a standard, uniform character onto the paper. This method can be described as a