Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black)

Best pens, super smooth, always write really well. 10/10

Comfortable in hand and black ink is fairly bold. Ink flows smoothly. Generally ink won’t smear ( I am not left handed) and appears to dry almost instantly. Ink lasts a long time and cost per pen is very reasonable when bought in packs of 10. Comes in different point sizes but I prefer the micro point 0.5. Other sizes available (0.38 really micro, 0.7 fine, and 1.0 bold).

I used to use pens of this brand and type. This is the best model that I have found fit my grip perfectly. It will be better if it can be cheaper.

It’s my favorite pen and I keep buying more. Smooth writing, nice ink and the size is just perfect.

I've tried all kinds of pens all over the world, only this pen is the best. I can do math better holding it, and surprised to find out it's for sale on Amazon, so I don't need to go to Japan to buy it anymore.

I'm a huge fan of Uni-ball Signo pens, but wasn't paying close enough attention to the model numbers when I ordered these. I thought I was ordering my favorite UM-151 pens, not these UM-100s. My mistake.On the plus side, these pens have the same excellent writing quality that my favorites do. Lines are clean and dark, and the pens move smoothly across the paper. The caps are also very secure when clicked all the way on.On the minus side, the barrel of the pen is smooth--like, really smooth--and requires a strong grip to keep it from slipping during use. The UM-151 has a rubber grip on the barrel which makings holding it much easier and more pleasant. I'll probably wrap some electrical tape or the like around to make it a bit easier to hold.So I'm satisfied enough with the pens, but they won't become my daily go-to. The UM-151 provide a better writing experience overall.

I have been a Pilot G2 fan for years and refused to switch pens until I tried this one. THESE ARE AMAZING.

These are supposed to be new pens, but one that I first used leaked and the other new one is already dry. Not sure if these are really “new.”