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 Extra long, thin nib in stainless steel, robust and wear-resistant (1 mm dia., 20 mm long), ideal as an assembly aid in places that are difficult to access Quick-drying, low-odour, smudge-resistant, waterproof ink allows for precise marking and writing Examples of use: small diameter drill holes for mounting shelf brackets, metal rails, lamps, wall sockets, etc.