vizgiz 3 pack 1/4 quick release adapter screw pin enhanced long 21mm flat head d shaft d ring 1/4" inch mounting screw adapter for dslr camera tripod monopod qr plate telescope ball head lens collar vizgiz description:<br> *100% brand new <br> *precision made 1/4" stainless steel tripod screws<br> *1/4" metal male thread with flat head screwdriver slot and hinged "d" ring.<br> *this captive screw allows the fitment of different styles of plates to fit directly into the base of your camera equipment via the 1/4" screw<br> *can be used with tripods, monopods, telescopes, ball heads, lens collars, lens plates etc<br><br> specification:<br> 1/4'' metal male thread<br> d-ring with flat head screwdriver slot , can drive it by coin. length: shaft is 17mm,<br> total length include base is 21mm.<br> the height of the screw head is 4mm.<br> the diameter of the d-ring head is 16mm.<br> material: steel<br> color: sliver<br><br> package:<br> 3pcs d-ring tripod screw<br>