Olfa "PL-1" Pro-Load Knife: The Pro-Load Multi-Blade Cutter - a revolutionary new cutter that easily combats the need for continuous blade change. This cutter accommodates up to (6) heavy-duty blades per load, which equal a total of (48) new cutting edges per load. This cutter also features an auto-lock blade slide, a ratchet blade lock for extra support while cutting through difficult materials, and a blade storage lock for safety. Uses "LB" blades.