Long Head Deep Hole Marker Pens 15 PCS 20mm Nib 5 Colors

15-Piece Deep-Hole Marker Set

This set supplies 15 long-nib markers in five colours — black, white, red, blue and green — designed for marking through narrow openings. The 20 mm by 1.5 mm nib reaches deep holes and tight gaps that standard tips cannot reach. Quick-drying, waterproof ink stays legible on metal, concrete, glass, wood, plastic and similar dry, dust-free surfaces. The PP barrels are sturdy yet light for comfortable handling.

Suited for trade and DIY layout work

Carpenters, metalworkers and installers who need to mark drilling points or alignment lines inside recesses will benefit from the extended nib. Users who only mark wide, open surfaces or who require fine-line detail smaller than 1.5 mm should consider a standard-tip alternative. The ink is permanent, so temporary marking tasks are not a good fit.

Capacity and practical limits

Fifteen pens provide enough stock for multiple jobs without frequent reordering. Each marker writes until the ink reservoir is exhausted; no refill mechanism is included. The 20 mm nib length reaches most deep-hole applications, but extremely narrow channels below 1.5 mm width will remain inaccessible.