Now you can practice and train safely with Cold Steels Leather Neck-Semper Fi Rubber Training Knife. With its realistic look, it is perfect for solo practice, training drills, disarming drills, and so much more without actually putting yourself at risk of harm. The Santoprene rubber blades are soft enough to prevent the likelihood of most bodily injury. The rubber blade length is 7, the blade thickness is 7/16, and the handle length is 5, making this rubber knife a total of 12 in length.