Specifications:Name: D-Shaped Camera Neck Strap Screw HolderThread type: 1/4"Materials: Metal and RubberColor: BlackHead diameter: Approx. 20 mmShaft length: 10 mmThe threaded part of the shaft is about 6 mmRubber buffer washer thickness: about 4mmFeatures:Quick release, easy to install, removable.High quality rubber, easy to adjust the tightness.High reliability and strong connectivity.Package Includes:4PCS 1/4 Spiral Camera Straps