This pack includes 40 pieces of 0.5 mm HB lead in a premium refillable metal case. Featuring a delicate opening mechanism, the case opens and closes with a satisfying snap. To open the case, simply press a thumb against the circular depression on the front cover and slide it down.

The new Uni Dia Nano Smudge-free pencil leads have a lot of features to offer you a convenient use and smooth writing experience. The leads are infused with nano-diamond particles to increase their strength and darkness. The special lead formula enables the lead colours to stick to the paper better than conventional leads. It is also smudge-resistant for using with highlighter pens.