The only Construction Marker with effective dust and moisture protection Push-button as umbrella cap and barrel with sealing ring for maximum all-round protection against external influences. Its new  "Power Lock"  mechanism inside is a milestone in the development: The duration of the lead holding power has been tripled The longevity of the product once more has been noticeably improve "LONGLIFE CAP" with extra strong clip and robust sharpener for long term use The new Pica-Dry: the marking tool for professional craftsmen Extremely sustainable thanks to its refill ability Its for all graphite lead 2B marks on almost any surface, whether dry, wet, glossy, rough or dusty Most versatile capabilities due to special leads: for bright or dark surfaces, in water soluble or water jet resistant Wipe clean from glossy surfaces with a damp cloth Barrel with roll stop Convenient quiver cap with special clip for perfect one handed handling Patented: The integrated sharpener in the q