The CRDBAG 1/4"-20 D-Ring Camera Screw (4-Pack) are made of stainless steel and has a diameter of 1/4″ (6.35 mm) with a thread of 20 holes per inch. At the head of the screw, there is the D-ring that allows you to tighten it, but it can fold to lie flat with the CRDBAG 1/4"-20 D-Ring Camera Screw (4-Pack).
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.