Arachnid Solid Brass Knuckle Paper WeightArachnid Solid Brass Knuckle Paper Weight. This knuckle is strong and durable enough to last for decades. Since the design is wire cut through there is no chance of the design coming off. The Long Way Down Solid Brass Knuckle Paper Weight Accessory is a four finger knuckle that provides more protection to your fingers. The knuckle gives off a beautiful shine so it can also be displayed as a decoration when not in use. Specifications Overall Length: 4.