Collapsible Sign Easel Stabilizer

I use a lot of inexpensive collapsible easels in my business such as [these](https://www.amazon.com/US-Art-Supply-Easy-Folding-Display/dp/B00YCIH4ZK/)

The problem is that since they don't have any way to 'lock', they can get off balance easily, and you can't pick them up to move them with a sign on them.

I designed these to snap on after setting the easel up. It locks it solid.

Also included is a threaded rod stand I made with nut that you can put a pile of these on for storage & transport.