We now offer the Green Camo Flat Face Knuckle Buckle. This knuckle is camouflaged for jungles, forests, plains, and other environments. All of these Green Camo Flat Face Knuckle Buckles come with a belt hole pin. The pin is made of brass and allows you to easily attach it to your belt. Have it ready for intimidating your target. The flat faces make for good blunt force intimidating. Color: Green Camo (Light and Dark Greens). Brass Belt Hole Pin.