NAGA Chalk Markers
Naga Chalk Markers are ideal for decorating and writing on glass, whiteboard, windows, glossy board, mirror and almost all non-porous surfaces. Easy to wipe off, when it is dry. The 4.5mm nib is reversible from a bullet to a chisel point. Made in Germany.
Also available are metal rings for the Naga Chalk Markers allowing you to attach them to a glassboard with a super strong magnet (magnets not included).
NAGA Metal Rings for 4.5mm pens (6) sale Separately –
Nage Metak Rings Make your marker magnetic: A ring mounted on a marker and fixed on the board with a magnet. (magnets not included)