ITEM NAME:Top 1/4" D-Ring Screw Stainless Steel For Camera Tripod Plate Tool Release E7I3 Specifications: 1/4'' metal male thread D-ring with flat head screwdriver slot , can drive it by coin. Length: shaft is 17mm, Total length include base is 21mm. The Height of the screw head is 4mm. The diameter of the D-ring head is 16mm. Material: Steel Package included: 1 x D-Ring Screw.The Height of the screw head is 4mm. 1 x D-Ring Screw. Length: shaft is 17mm. D-ring with flat head screwdriver slot, can drive it by coin. Material: Steel.