RAYSUN 10 Pack Metal 1/4" to 3/8" Convert Screw Adapter Converter for Tripod Monopod Ballhead - Camera Screw Thread Adapter Converter 1, Tripod Screw Adapter Converters 1/4" to 3/8"; 2, Thread Adapter with female 1/4" thread to male 3/8" thread; 3, Made of metal, solid and durable; 4, Fit as well as original reducer; 5, Package: 10 x Tripod screw adapter converter.