KA-BAR Knives TDI Last Ditch Knife, Fixed Blade Knife, 1.625 Blade Length, 3.625 Overall Length, 9cr18/Black Steel, Plain Edge, Includes Plastic Sheath 1478BP With an overall profile about the size of a credit card" this knife can be concealed just about anywhere. Pin it under a tactical vest strap" carry it in your wallet or lash it down with your boot laces. This backup knife is intended to be readily available as your Last Ditch attempt at defense when all other weapons have been removed. Sold with a hard plastic friction sheath and black cord.