Cold Steel 92R49Z Rubber Training knife, Karambit, Clam Package Introducing our new Rubber Training knife nicely designed and manufactured from a pretty strong material making it more efficient. Material: Santoprene One of the best feature of this cold steel training tool is that Karambit seems like it can very easily cut you during practice if you are not careful. Quality is assured and maintained up-to a certain level meeting all the current criteria of market. Rubber knife for training has blade length of 4 inch Training karambit knife has overall length of 9 1/8 inch