Gods Thunder Heavy Duty Knuckle Belt Buckle Black Paper Weight. This heavy duty paper weight will make sure that none of your papers fly away, whether in the office or in your home. The screw rivet provided also turns these knuckles into a stylish buckle. Four 1-inch finger holes have a rectangular knuckle design that is sure to leave a lasting impression. overall length: 3 inches, weight: .85 lbs