Material: Metal, It is wear-resistant and durable
Male thread (outside): 3/8
Female thread (inside) :1/4
Applicable for ball head, tripod, monopod, DSLR, flash brackets, Lens Plate Button Heads and etc.
This reducer screw allows you to convert any 3/8-16 thread for the insertion of a 1/4-20 screw.
10 Pieces 1/4 to 3/8 convert screw adapter