Dull? Even the highest quality utility knife with the best blade will eventually become dull. Of course, this always happens at the most inconvenient moment. Before getting frustrated, having a replacement blade on hand is ideal. In most cases, you can simply swap it out, and you can cut, separate, or open everything worry-free again. If you have a Secumax 350 from Martor, you will find the corresponding replacement blades here. The blades can be easily replaced without any tools. Additionally, a replacement blade can be stored in the handle of the knife. This way, if a blade becomes defective, you don't have to return to the storage room right away, which would take a lot of time; instead, you can quickly replace the blade and then swap the replacement blade in the handle during your next visit to the storage room.