SmallRig Double Head Converter Screw Pack 1/4 inch to 1/4 inch Screw & 1/4 inch to 3/8 inch Threaded Screw Adapter - 1581SmallRig Double Head Converter Screw Pack 1/4 inch to 1/4 inch Screw & 1/4 inch to 3/8 inch Threaded Screw Adapter - 1581