The compact RZ3 Utility Knife combines the durability of an industrial knife with the safety benefits of a self-retracting safety cutter. To prevent painful and costly injuries the blade will spring-back into the cutter once the cut is completed. With a shorter blade depth the contents of boxes are less likely to get damaged. The unique integrated hinge design and easy-open dial make for a convenient tool free blade change. Plus the all metal construction is extremely durable. For better retention, purchase with the UKH-430 Plastic Holster and CL-36 Coil Lanyard.