For more than forty years U.S. Stamp & Sign has led the industry with a steadily growing list of innovative identification products. Their wide range of offerings include top quality stamps, business stationery, custom signage and much more for the home, office and small business markets. As the inventor of pad-free stamps, U.S. Stamp & Sign has helped both small and large businesses by providing easy-to-use products at an affordable price. The U.S. Stamp & Sign Stamp-Ever 10-in-1 Teachers Stamp Kit is designed to help teachers process their student s work. This kit includes two stamp mounts - one red and one blue. These self-inking stamps re-ink automatically after each impression for quick, repetitive use. Also included are 10 interchangeable dies to be inserted with the included tweezers into the stamp mounts at the users need. The stamp impression size is 5/8 inches in diameter. U.S. Stamp & Sign is proud to provide the professional tools to maximize everyday communication.