Markers made of 1045CS carbon steel;hardened to approx. 50-55 HRC. Quadrilateral square pens with a height of 65.5 mm and side 8 mm;terminated with a marking element - a letter with a height of 6 mm. Marking is done by putting a letter to the material and a strong hammer strike at the opposite end of the punch. Set collected in a plastic container;contains letters from A to Z and the & sign.