The SKIF TK-B Throwing knife features 420 grade steel that allows natural resistance of corrosion. It is extremely easy to sharpen this particular metal to a fine edge or point. Type 420 Stainless Steel has a higher carbon content to increase hardness, improve strength and give better wear resistance. Brand new to the United States the SKIF TK-B Throwing Knife has a 3mm thick 3.9 inch blade. The SKIF TK-B Throwing Knife has an overall length of 7.6 inches and is shipped with a durable nylon sheath.