Product detail: FEICHAO Professional 3/8 1/4 Hot Shoe Adapter Tripod Mount Screw to Flash for DSLR Camera This adapter easy to install microphone, LED light, monitor to DSLR, camcorder or digital camera, Flash Remote Trigger or adapt anything else that with a 1/4" 3/8'' male post. Fits on the hot shoe of most cameras and can connect 2 cameras together. Material: anodized aluminum metal , Lightweight durable construction. The diameter of the screw nuts is 1 inch, please kindly note it. Package included: 2pcs hot shoe mount adapters.