Long Head Markers Bathroom Woodworking Decoration Multi-purpose Deep Hole Marker Pens Description: Color: Black / Blue / Red / Green / White Top of the head: 20mm Waterproof and quick drying Suitable for furniture decoration, bookshelf, marked light drilling position. It is also a deep hole in metal processing, automotive manufacturing and other manufacturing industries. Mark the processing location. Also mark on the surface of wood, metal, glass, etc.