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. If you want any Blackjack Model 13 in a single guard, simply purchase the knife online and request the customization be made. This service will add about 10 days to the shipping time but the knife will be customized exactly to your standards. 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.