Foto&Tech 5 Pieces 1/4" Male to 1/4" Male Threaded Screw Adapter for Camera Cage/Shoulder Rig/Tripod/Socket Studio/Lighting Equipment/LED panel/GoPro Perfect for putting two photo equipment devices together 5 Precision made 1/4" to 1/4" screws, Easy to use The length is 20mm, and the width is 16mm Easy to add and remove by hand Made of metal, solid and durable, Silver Plated Surface