Vintage tool used especially for drawing parallel lines of equal or different width. Nibs are both adjustable and they are rotating on a shaft inside a hollow handle. Made in Czechoslovakia - KINEX - Mechanika Bytča plant (current Slovakia) in the 70's. When you start to work, you have to pull the pen out with pushing the shaft. When you are done with your work and nibs are cleared, you can put it back to the "shell" with pulling the shaft back (so you can place it the box). Material: steel, brass , "shell" is made from stainless steel. Weight of the pen: 32 g. Length: approximately 13,5 cm. Pen is used, but in very nice condition with some visible marks of usage and longer storage.