4 x Metal Screw Adapter 1/4 & 3/8'' Threads for Tripod,Flash Holder,Light Stand
It has 1 x 1/4" thread and 1 x 3/8" thread. It can fit ballheads, quick release plates and flash holders with 1/4" or 3/8" screw. + It has 1 x 1/4" thread and 1 x 3/8" thread.