Frag Out! Grenade Knuckle Spring Assist Knife is an epic device you can use to keep the papers on your desk from blowing away or use the button to swiftly eject the black blade. Whether you want to set a precedence, or clear a room, this Frag Out! Grenade Knuckle Spring Assist Knife does the job. It is all metal construction except the grenade motif grip, which is a nylon fiber polymer. The blade is a sharp 3 inches that is have serrated and half razor sharp. Super durable and useful in a pinch. Specifications Overall Length: 7.5 InchesClosed Length: 4.5 InchesBlade Material: 440 Steel, Black Matte Blade, Half Serrated, Razor SharpOverall Width: 3 InchesGrenade Materials: Aluminum AlloyFinger Hole Size: 1 inch by 1 inch Round, 4 Finger holesColor: Ninja BlackIncludes: Pocket Clip