Tb/12 Worther (Woerther) 1.18/1.15 mm Lead Graphite Black HB

These are absolutely the best leads I have every used. They are smooth writing and strong. I have a bit of a heavy hand and these leads are just great.

Doesn’t match with my Worther mechanical pen.

I was very happy to have found them so I ordered three of these, only to find out that they do not fit my montblanc pix 26 pencil - the mechanism does not grab them and they fall off the tip because they are too thin. I measured them with a caliper and they run around 1.03 - 1.09mm. Funny enough Autopoint 1.1 mm lead fit the montblanc pencil much better even though the advertised width is smaller, and sure enough the Autopoint measures wider than the Worthers. Additionally the little tube says 1.15mm, not 1.18mm as it is stated in the description. Regardless it's not even close to 1.15mm.