The trench knife was popular in World War I, and was primarily used as a close combat fighting weapon. It features a razor sharp blade made of stainless steel. The drop point style blade has a tapered upper spine, improving its piercing capability. The blade surface is finished flat black with "U. S. 1918" stamped in silver. The Army green knife handle is made of solid aluminum alloy with a steel core. The surface is fully anodized. Four finger holes are featured similar to a knuckle duster. It protects the hand and ensure you will have a tight grip on the knife no matter what. The spring assist deployment is quick on the knife and impresses onlookers. A screw or oil, such as machine oil or shredder oil, can be used to modify the speed of the knife. On the handle is a handy pocket clip.