The Blackjack Model 13 is an ultra classy, incredibly well designed knife built rock solid with a full length mortised tang for extreme duty purposes. Ultra comfortable and fast in the hand the Model 13 is built with a thick double quillion for survival and defense purposes. All Blackjack Knives sold by DLT are available in a single quillion. Measures 10.5” overall with a 5.5” convex ground blade made of .230” thick A2 tool steel. Includes a leather sheath and proudly made in the USA.