This Stainless Steel 1/4" to 3/8" Tripod Adapter/Bushing (Set of 5) from Sunwayfoto is a set of five stainless steel bushings for adapting 3/8" mounts to accept 1/4" screws. Each bushing is designed with a screwdriver slot to make removing the bushing more convenient. This TN-1 bushing has a long internal length that's well suited for a long stud or a deep socket.