SE is proud to present our 36-Piece 3 mm Number and Letter Marking Punch Set—great for various metal-marking needs on leather and wood, as well as for jewelry artists. Each punch is 3 mm thick and approximately 2-5/8" long. This set comes organized in a pouch with labeled letters, numbers, and ampersand (&). Note: Metal stamps are to be struck with a hammer or mallet to make impressions on flat surfaces. SE Intellectual Property Rights Notice: Important: Avoid getting counterfeit items. Genuine SE products come with the SE logo on the packaging. SE is a registered trademark protected by US Trademark Law.