The Joby UltraPlate 208 is a 208mm / 8.2" long Arca-type compatible QR plate. It has eight
female 1/4"-20 threaded mounting holes for accessories such as a flash,
microphone, action camera, secondary arm, or smartphone with a
compatible mount. A stainless steel male 1/4"-20 threaded screw attaches
the plate to your camera.