uni Mechanical Pencil Lead Nano Dia 20 leads x 3 Packs (Total 60 leads) Japanese Stationery Original Package. (0.5mm, Red)

Although the color isn't as bold as regular grey lead, these work nicely in the mechanical pencil that I have. The color does stand out enough for marking, counting or emphasizing what I'm writing.

They are exactly what I wanted.These are not for writing in blue. It's totally possible, but they're best suited for sketching a light blue outline of something you intend to line later.

The lead constantly broke when trying to write with it. No matter how little pressure I put on the pencil when trying to write. A total waste of money

Great color but brittle.

This product is horrible. constant breakage even with extreme light touch use, even underlining. Breaks so often I am throwing them all away. Don't waste your money!!!!

Lead is incredibly brittle and snaps off in the pencil everytime you write. Would not recommend

Work great

Just keeps breaking. I have a very light hand but it just can't handle any pressure at all.