ITEM NAME:1/4 D-Ring Convert Screw Pull Ring Adapter For Camera Tripod Monopod 5Pcs A#S Product Description Description: Features: For connecting various types of DC,DV. Commonly used in cameras,the camera tripod head quick release plate,tripod screw,head screw. Light weight and strength high. Material: Stainless Steel Color: Silver Weight: 15g Total Length: 21mm Shaft Length: 17mm(Included thread) Head Diameter: 12mm(without D-ring) Head Diameter: 16mm(with D-ring) Head Thickness: 4mm Included: 5 X Screw.Shaft Length: 17mm(Included thread). Included: 5 X Screw. Head Thickness: 4mm. Light weight and strength high. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.