The GlareOne Adapter Female 1/4"" - Male 3/8"" is a tripod adapter to adapt a 1/4"" thread to a 3/8"" thread.
Thanks to this adapter, you can mount all accessories with 3/8"" threads in places where 1/4"" thread is available.
For example, You can mount a tripod head on a monopod or clamp with 1/4"" camera wire.
Thanks to a notch, the adapter can be tightened or loosened with a flat screwdriver.