Quick releaseThe 1/4 quick-release screw is finished in black nickel, the solid design provides a positive connection point while perfecting the quick and easy attachment and release system. Safe and stable High grade rubber included, and the black non-slip rubber mat can prevent the camera from loosing effectively, to help keep tight and protect your camera from scratches. Type & SizeTYPE: 1/4-20 Thread Camera Strap Screw Holder SIZE: Screw Thread Diameter 1/4", Total Shaft Length 10mm, Thread Part of the Shaft approx. 6mm, Head Diameter approx. 20mm, Rubber Gasket Thickness approx. 4mm. Package includes2pcs 1/4-inch digital camera attachment shoulder strap screws,Fits most of type of quick release neck straps and attaches to the connector. Colour Name:2 pack Product description Spectification Product Name: D-Ring Camera Neck Strap Screw Holder Thread Type: 1/4Inch Materials: Metal and Rubber Package Content : 2PCS Camera Neck Strap Screw Holder Feature Quick release, easily installed, can be removed.High-quality rubber with of, easy to adjust the tightness. High durability and the strong connectivity.