Neewer 4 Pack Short Adapter Spigot with 1/4"-20 and 3/8" Female Threads for Video Lights and Stands with 1/4" and 3/8"Threads Converting 1/4" female to 3/8" female screw adapter for common Tripod / Monopod /rod rail system / light stand and bracket One side supports 1/4" standard threads, the other side supports 3/8" standard threads. Easy to install, small size can be carried and stored easily. Solid construction, it's durable for long-life service. It is a handy tool for your photography setup. Note: Does not include double-male spigot with 1/4" and 3/8" threads.