The Yato YT‑69930 is a technical marking chalk / grease pencil set, intended for marking on a variety of surfaces in construction, metalwork, woodworking, and related trades.
Advantages & Use Cases
- Because it’s an “oily” or “fat” marking chalk, it tends to leave a more durable line that resists smudging or rubbing compared to dry chalk on many surfaces.
- The multiple colors allow distinguishing between different marking types, phases, or materials in a job.
- Useful in workshops, construction sites, metal fabrication shops, masonry works, etc.
- Suitable for marking on less porous or smooth surfaces (e.g. metal, glass) where other chalks may not adhere well.








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