Shinwa Rules Construction Chalk 74169 Blue 1bag(10pcs)

Comes with a plastic case that carefully protects the choke.
Compact size and convenient to carry.
Since it is a transparent case, you can see the color of the chalk at a glance.
It can be written smoothly and erased cleanly.
In addition to blackboards, it can be used for various things such as wood, stone, iron, and concrete.
The vivid colors make it easy to read and work smoothly.
For writing on blackboards, ki, stone, iron, concrete, etc.