1. Mould Opening Tool: The mould opening knife with recess reset features a builtin spring mechanism. It produces clear and complete indentations on both regular copy paper and coated paper without causing any damage. 2. Adjustable: The recess depth is adjustable. Use a 13mm Allen key to turn the screw upward for a deeper recess or downward for a flatter recess, then simply tighten the nut. Ensure the left and right indentations are balanced so that the upper and lower wells align . 3. Portable: The tool has aluminum alloy molded edges and magnetic, movable paper stop strips for precise positioning. The folding handle is removable and replaceable due to its threaded design. The die can also be swapped to create dents of different widths. 4. Simple and Compact: Compact in size, easy to use and maintain, it serves as an ideal supporting device in the binding process. Whether working with coated paper, leather paper, or photo paper, it delivers crisp markings effortlessly.