【ULTRA SHARPNESS BLADE】SK5 steel blade is sharp and not easy to be broken when using. DIYSELF utility knife would be a good helper for you because the cutting process is fast and the blade is not dull. 【BLADE REPLACEMENT AVAILABLE】You could open the box knife shell to achieve blade replacement, and there are 10 extra utility blades for replacement. Besides, both tips of each blade could be used to cut various materials. 【EASY TO STORE】There is a hole design at the end of boxcutter, so the box cutter retractable can be hung on the wall with a rope, You could also use rope through the hanging hole at the end of the razor knife and hang it on your waist, which is easy for you to carry. 【ANTI-SLIP】Box cutter retractable heavy duty is made of aluminum alloy with TPR rubber on both sides, which helps increase friction with palm when you grip the box knife, so that the box opener is not easy to slip off during use. 【USED WIDELY】Box knife is widely used by many professional builders, DIY enthusiasts, electricians and woodworkers, and it is suitable for cutting cardboard, carpet, PVC, leather at home, office or factory.