Edding 8850/1 Bl Rep Carpenter Pen Black (Box of 5)

Amazon

Long nib carpenter pen with special quick drying permanent ink Bullet tip approximately 0.7-1 mm Ideal for marking hard to reach places such as drill holes Will mark virtually all surfaces including wood, glass metal and plastic Smudge proof and water resistant when dry

Euroffice

Deep hole marker for permanent spot markings on smooth, dry, dust-free surfaces, e.g. metal stone, glass, wood, plastic. The pack contains 1 carpentry pen in black.