The Spyderco Delica4 Trainer is a non-sharpened knife that allow for the safe practice of self defense, martial arts, and training scenarios. The trainer lets the user learn and deployment techniques, perform drills, and develop confidence and muscle memory without risking cutting themselves or others with a sharp blade. The Delica4 Trainer is identical in weight and size to the 'live' model. To enhance the balance of the piece Spyderco tapered the unsharpened tip and drilled holes through the blade, removing unnecessary bulk. Volcano grip texturing on both sides of the handle put the brakes on your hand slipping while training. All Spyderco training models have red handles designating them as non-sharpened.