Blunt safety tip blade prevents puncture wounds / damaged merchandise. Fits EZ3, RZ3, S4, S5, S7 Safety Cutters. Single notch stiffer blade design. Efficient .017 thick Safety Point Blade is a safety device in itself, when installed into the S4, S5 safety cutter(s). These "purpose - built" blades significantly reduce cutter injuries, while enhancing the cutter's precise cutting geometry and safety features. Designed to easily slice corrugated and chip board material.