SELF-RETRACTING BLADE - The spring-activated blade retracts when lifted from the cutting surface, minimizing accidents and unwanted cuts. Even if the blade slider is engaged during use, the built-in safety guard cannot be overridden. The blade is always covered once the cutting starts. RAZOR SHARP BLADE - Our knife is preloaded with an SKB-8 Safety Blade made from high-quality carbon tool steel for unparalleled sharpness and superior edge retention. When the blade is exposed it effortlessly cuts up to 0.59 inches (15 mm) in depth. FIBERGLASS REINFORCED HANDLE - This sturdy utility knife has a fiberglass-reinforced, high-impact handle. The textured design provides a comfortable, non-slip grip and the stainless steel channel keeps the blade securely in place. MULTIPURPOSE HEAVY DUTY DESIGN - The box cutter can be used for commercial, industrial, and retail applications. It's great for cutting light and heavy duty materials like cardboard, shrink wrap, tape, strapping, film, cartons, and more. THE OLFA STANDARD - As the original inventor of the Snap-Off Knife, OLFA has maintained a standard of cutting excellence for our quality and durability. Pairing your OLFA Safety Knife with OLFA Safety Blades will provide optimal results.