These designs are tried and true, the result of painstaking research and development. Cold Steel knives represent high performance knives, daggers, kukris, tomahawks, throwers and survival tools. The Santoprene rubber blades are soft enough to prevent the likelihood of most bodily injury. They do however, have a level of firmness that might cause injury to the face or the eyes, so it is recommended that appropriate eye protection or a fencing mask is utilized at all times when using a Cold Steel rubber training knife.