Patuo 1/4 to 3/8 Female to Male Reducer Bushing Convert Screw Adapter Tripod Screw Connecter Camera Rig Accessories- 10 Pack These are 10 pcs of threaded adapter with female 1/4" to male 3/8" thread. It allows to convert any standard 3/8"-16 thread to a standard 1/4"-20 screw. Material: Metal Package includes 10 pieces of reducer bushing converters and pemier ceaning cloth.