[Long Head Deep Hole Marker] Professional carpenter's marker pen designed for tight spaces, the slim tip easily fits into deep holes, gaps, or hard-to-reach areas, making it perfect for marking nail holes, screw holes, and other precise locations on wood, metal, plastic, and more. [ and Comfortable Grip] Construction pens made from PP material, built to last, and offer a comfortable grip for extended use. [Quick-Dry Waterproof Pens] Long nib marker features quick-drying, waterproof ink that ensuring long-lasting, clear marks on surfaces like aluminum, concrete, glass, metal, and more. [20mm Side Ruler] Permanent markers equipped with a 20mm side ruler with markings every 5mm, allowing for quick and accurate measurements. A reliable and practical addition to your toolkit. [Versatile Use] These long nose markers are perfect for furniture making, bookshelf assembly, light hole positioning, and other woodworking tasks. Also suitable for deep hole marking in metalworking, automotive manufacturing, and more, making it a must-have for professionals and DIY enthusiasts. 3 PCS Long Head Deep Hole Marker Pens, Long Nib Marker Set, Professional Construction Markers Scriber Marking Tools, Permanent Markers and Marker Pens for Metal, Carpenters, DIYers, Woodworking Pencils Pen tip: 20mm/0.79in Length: 112mm/4.4in Applicable: Metal, Wood, Glass, etc. Colour:As Shown Material:Plastic Package Contents: 3 * Long Head Deep Hole Marker Pens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.