The Rounded-Tip Safety Blade limits cutting depth to protect contents within the box as well as reducing chance of employee puncture injuries. Superior sharpness and edge retention make this blade a great choice for general purpose cutting applications. This versatile blades fit a variety of OLFA® knives including the SK-4, SK-6 and SK-9 Safety Knives as well as the UTC-1 Utility Knife. LIGHT TO HEAVY-DUTY CUTTING Ideal for cutting corrugate; plastic bags and pouches; stretch wrap, film, and foil; plastic strapping; paper and more. Also sold in a package of 50. (RSKB-2/10B, #9615).