ITEM NAME:1/4 '' screw Screw stainless steel adapter for camera Camera Suppport tripo A9R2 1/4 '' screw Screw stainless steel adapter for camera Camera Suppport tripo A9R2 Weight: 6.5g Material: Stainless Steel 1/4'' metal male thread D-ring with flat head screwdriver slot , can drive it by coin. Length: shaft is 10.5mm, total length include base is 14.5mm. the diameter of the screw head is 11.7mm. the diameter of the D-ring head is 16mm.