This is a case of 20 pencil leads suitable for Uni-ball 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.
Soft on the paper, but seems to be a hard lead, well balanced just like expected
from an HB lead. The case opens with a small half twist around an helical ridge,
just like a screw. The case cap has a small dent that helps to prevent the case
to roll and fall. Works great on the Kuru Toga, but, well, almost all leads do.