The 1/4"-20 Female to 3/8"-16 Male Screw Adapter for Tripod Camera Plates from Rockn screws onto a 1/4"-20 screw and provides you with a 3/8"-16 screw instead. The adapter features a 1/4"-20 threaded hole on the bottom and 3/8"-16 screw on top. It has a knurled design that lets you screw it onto...