Whenever I’m at a store that has gel pens I always buy some!
I use these for marking cards. The Gelly Roll pens I use for finer marks, like putting writing on the cards for stack number or card value. The Uniball pen has a wider tip and I use it for things like whiting out the faces on the angels or wheels on the bikes.
These are super handy to have around. Usually I have one on my desk, one in my car, and one in my backpack.
-Louie