The VT-3991 Submarine Knife is not only one of the sharpest knives in the market but it is also one of the safest. Designed with a versatile blade guard and tipped with a metal guide shoe to help peel cable jackets and six molded notches of varying size for wire stripping. Leverage is a key component when doing anything with your hands and the Submarine Knife gives you the ability to operate it safely with just one hand.