The Really Right Stuff 3/8"-16 to 1/4"-20 Stainless Reducer Bushing RRS-9000235 is a versatile accessory designed to adapt larger 3/8"-16 threaded mounts to smaller 1/4"-20 threads. Made from high-quality stainless steel, this reducer bushing ensures durability and a secure fit. It's an essential tool for photographers and videographers who need to mount various accessories and equipment with different thread sizes, providing flexibility and convenience in their setups. Really Right Stuff 3/8"-16 to 1/4"-20 Stainless Reducer Bushing RRS-9000235