This belt buckle is made of Aluminum so they are lightweight but will still be able to do some damage if you need to defend yourself. Screw in the buckle pin and transform this knuckle into a buckle. Overall length is 4.25 inches.stainless steel and has large finger holes ideal for larger hands. All belt buckles/paper weights are intended to be used as a belt buckle or paper weight only. Please check your local and state laws for the legal sale of this item.