My favoriteReview by hotboi / (Posted on 7/22/2017)good marker writes best on metal. slips sometimes on plastic but probably depends what paint you fill it with. about the size of a chapstick tube so doesnt hold alot
superbReview by david / (Posted on 2/18/2017)These are superb! I say that comfortably too because of two reasons. One of course is because of the steel ball is not stiff, or stuck in place. It reacts more like a paint marker. Rather than like for say a ball point pen. Also for use with anything you can fill it up with. Try using your own blood!!!