Patuo 1/4 Inches D-Ring Camera Quick Release Screw Tripod Screw Adapter Connecter DSLR Camera Rig Accessories- 2 Pack This is 2 PACK of Precision made camera quick release D-ring screw w/ standard 1/4" -20 thread. Material:Metal Total length:14mm Threaded:5mm; clearance shaft:4.5mm 2 pieces pack with premier cleaning cloth