Seems pretty unassuming at first, this thing is tiny. but is definitely worth trying out.
The steel tip is no push over , holding up well on wood.
Filled mine up with white Magic Ink and I think i'm in love.
A very nice addition to your pocket lineup.
i could see this working perfectly fine but they dont work at all on rusto, i have seen some reviews saying that they do, but i cant get them to fit on any of my rusto cans, play it safe and buy female caps.