Fomito 5 x D-ring 1 4 Mounting Screw Diameter 12mm for Camera Tripod Monopod or Quick Release Plate Can be used with tripods, monopods, telescopes, ball heads, lens collars, lens plates etc 1/4" Stainless steel (metal) Tripod screws 1/4" metal male thread with flat head screwdriver slot Diameter is 12mm in length, approx 5mm threaded, 4mm unthreaded 5 x Fomito 1/4" Screw