Weight bar spinlock collar 1 inch or snowflake ornament

My design of a collar to hold weights on the 1" threaded bar.

There are holes so you can fit nickels inside for more inertia so it spins on and off faster. I have not actually printed this so please post a print if you like it and it works well. If not, let me know and I can adjust things.

Or hey, you can hang this on your Christmas tree.