Introducing these high-quality, permanent ink marker pens with a 20mm long nib and fine tip. Perfect for those who require a deep hole reach head marker, these pens are ideal for use on a variety of surfaces. The ink is long-lasting and the nib ensures accurate and precise marking. Suitable for use in the workshop, office or for personal use, these pens are a must-have for anyone who needs to mark items for identification purposes. Whether you need to label file folders or mark equipment, these permanent markers will get the job done.