The Boker A-F Rubber Training Knife is a highly valuable instructional aid. The rubber is strong enough to hold its shape during most training exercises, but pliable and soft enough to bend when pressed. This means that it can be used to simulate knife attacks without risk of injury to either party. Plus, its sides can be chalked to determine points of contact for scoring purposes. This product ships as a pack of 2 training knives. Each knife is 11-⅜ in. long with a 6-½ in. blade. Although this product is safe for use in controlled environments, participants in training exercises should be careful when using this near the eyes and throat. Limited lifetime warranty. A chestnut tree is the world famous trademark of the Boker knife manufactory in Solingen, Germany. It represents innovative, high quality, exceptional knives, manufactured with pride, by hand, for over 145 years.