This is a case of 20 pencil leads suitable for Uni Kuru Toga mechanical pencils. The lead has a special composition: a soft outer layer around a harder inner core. As a result, the lead can be easily shaped into a point, which is what Kuru Toga pencils are uniquely designed to do. The lead case comes in various colors, and the slim profile slips easily into your pencil case.
I have always preferred soft leads over the ones that come shipped with the
mechanical pencils, and I prefer these to the HB leads that come in the Uni Kuru
Toga. I wish there were softer ones as well, like 2B, but I will be satisfied
with these until that happens. At any rate, the lead writes very smoothly and
does not get stuck on the page like some harder leads do. A winner!