For all material surfaces, from glossy to very rough With water-soluble “MULTI-USE” marking crayon Extremely insensitive and versatile for water resistant marking Most economic: 1 lead substitutes up to 5 conventional ink or paint markers Patented high-tech twist mechanism for rapid and convenient handling Convenient quiver cap with clip for perfect one handed handling Extremely long lasting and environment friendly due to high quality product technique and refill ability Lead never dries out – full performance at all times from the first to the very last line Markers and refill leads available in 7 colours Avoid lead temperature over 40° C Lead diameter = 10 mm, length = 85 mm