Boker Plus 02BO553T Jim Wagner Training Knife with 4 in. Blade, Black "Cutting edge" and the impact surface of the handle are equipped with a rugged, wear-resistant surface Includes blue and red pens (commercial lipstick can be used as an alternative), all contact can therefore be clearly documented Facilitates a significantly more accurate analysis of training activities Blade length: 4 in. Overall length: 9 in. Weight: 2.6 oz. Limited Lifetime Warranty