• Large Snap-Off Blade Utility Knife Retractable Blade Box Cutter. • Rugged and lightweight knife body made of ABS high-impact plastic. • Extremely sharp snap-off blade. 8 in dividual cutting sections on each blade. • Snap sections at any time to expose new cutting surface. • Change blade easily when dull or worn. • Sliding safety mechanism keeps knife locked into position during use. • Retract blade when not in use. • Blade length: 4-1/4 in . • Full Length (blade retracted): 6 in . • Full Length (blade out): 9 in .