10Pcs 1/4" to 3/8" Camera Tripod Thread Adapter Convert Nut Screw Adapter tr
It is made of bronze, and can achieve the conversion between any standard 3/8" thread and standard 1/4" screw. - The Screw Adaptor allows you to convert any standard 3/8"-16 thread for the insertion of a standard 1/4"-20 screw.