Rikagaku Dustless Chalk Holder is compatible with Rikagaku Dustless Chalk – regular size. The knock type holder helps ensure a more solid write, while allowing you to easily extend the chalk. We recommend keeping one finger over the chalk tip as the spring is strong and can extend out more chalk than you might expect, potentially sending your chalk flying out entirely. There’s also a magnetic piece so you can attach your holder to steel.

• Each holder includes 1 piece of Rikagaku white dustless chalk
• Holds 11.2mm diameter chalk
• Cap ensures clean portability