The Greenlee 0652-11 Heavy Duty Utility Knife comes with heavy-duty patented serrated replacement blades and has an over-molded grip for increased user comfort with a non-slip grip. Its retractable multi-positional blade allows blade to be locked in 3 positions for versatility and secure cutting. Featuring an easy push button for storage of up to five blades, the screwed assembly prevents accidental opening during difficult cuts providing a safer, more secure cut.