New 3-in-1 Carpenter Pencils with Finger Grip for Construction - Incl. 7 Lead...

Moreover, its fine point of 6 mm and 43 mm length allows it to go and trace in any hole. And if you extend the lead, you can even trace in holes of mm! THE MOST CONVENIENT CARPENTER PEN WITH SHARPENER PERFECT FOR WORKSITES: It is so practical that you won't lose it since it attaches directly to your pocket with its quick and solid clamp.

eBay