MtG +1/-1 counter card clip

The printed parts should fit unsleeved and sleeved cards alike.

You'll want to be extra careful about clearing out the slot where the clip goes onto the card to avoid damaging your cards when using these clips. (Of course, sleeves help here, but you may still not want to clip these onto your black lotus-price level collectors items)

(Note: the white parts in the pictures aren't printed with dual extrusion, that's just a dash of paint.)