Auray Boom Pole Holder

is depends on what type grip head you have, a good one would beThe Impact griphead from B&H that we sell it has multi size holes Link to Impact Grip head https://www.bhphotovideo.com/c/product/838888-REG/Impact_kcp200b_Grip_Head_for_Lights.html

The Auray seems to be more durable than the Neewer one. When I was adjusting the grip head for the boom pole that we were using the Neewer base (of the pole holder) sheared off. Neewer did send us a replacement though.

This would require a knuckle to attach it to a c stand. Here's an option B&H # IMKCP200B.

I don't have it in front of me to measure, unfortunately, but it must be able to accomodate a fairly significantly wide pole because the one we have is easily 2" across and has plenty of wiggle room in both areas that make contact with the holder.

Yes with a C stand Knuckle, something every cinematographer should have in the kit. Just make sure the boom pole and Mic don't get too front heavy, if so sandbag the stand to stabilize it. Better yet use a century stand rather than a lightweight light stand.

I have found that my boom pole will sometimes swing around in the socket from the weight of the boom mic. I certainly would not trust this setup to an expensive camera. you might want to try something with mafer clamps for more security. don't forget sandbags!

It's designed to go in the knuckle of a c stand

It's a standard grip head.