They have BOTH leaked and I’ve ruined 3 dress shirts....

complete junk i have used these for a while and every one of them have leaked or exploded on me today the one exploded so bad that it destroyed my pen, ruined my shirt and covered my chest and my arm in ink.... will not be buying again and neither should you

, I've ruined 2 uniform shirts after these refills started leaking....and they were only about 1/4 of the way through the ink.

The quality of the needle tip is as good as a new pen - s unless you have broken the pen (casing) the refills are the way to go!!

As much as i like these for doodling, i dont like that i have to replace them before they are empty