I had no clue what a Zirkel was, and for others who may be wondering the same ....
https://purpledaisiesquilting.com/pr...ic-pin-cushion
So the big question ... how does it know to put the head of the pin on the outside edge rather than inwards?
I just have a broken cow magnet inside a tin box and toss my pins into it.
No problems picking out pins as I need them.
If I toss them right, the heads stay sticking up in the air for easy picking.
Otherwise they just kind of lay there and I can still easily pick them out.