10 Pack Long Nib Markers 20mm Deep Hole Multicolor

10-Pack 20mm Deep-Reach Markers

This set supplies ten long-nib markers with a 20mm by 1.5mm tip designed to reach inside drill holes, screw holes, seams and other tight gaps. The quick-drying, waterproof ink resists smudging and fading on wood, metal, concrete, glass, plastic and similar dry, dust-free surfaces. Two pens each in black, white, red, green and blue give tradespeople and DIY users colour-coded options for layout, identification and inspection marks. The polypropylene barrel is lightweight, pocket-sized and built to withstand daily jobsite handling.

Replaces Short-Tip And Standard Markers

Conventional markers cannot reach the bottom of deep holes or narrow channels, forcing users to estimate or switch tools. These 20mm nibs eliminate that gap when marking anchor positions, pilot-hole centres or joinery layout inside cavities. The upgrade is worth it whenever a standard tip leaves the mark short of the work surface, especially on structural timber, steel fabrication or masonry where a missed reference point means rework. Buyers who only mark flat, open faces will not need the extra reach.

Limited To Dry, Dust-Free Surfaces

The ink formulation requires a clean, dry substrate to bond; oil, moisture, heavy dust or wet concrete will prevent adhesion and legibility. Very rough or porous textures may also cause the fine nib to skip or wear faster than on smooth materials. The marker is not intended for permanent labelling on oily metals, submerged applications or surfaces that remain damp during curing. Users needing marks on wet, oily or continuously submerged substrates should select a product formulated for those conditions.