Ink Pen Frustration Free Pen Charm Attachment Rings Plated Stainless Steel 25 Pack

Love the product as described

Used all my ink, joy, pens, but found I had to sand down the top of the pen, because once you add this ring, it’s hard to click the pen in and out.. But if you send them down a bit, these work OK.

Going to try to figure these out. Came exactly as described.