Strong and sturdy base with a lapped standing surface. With measuring beam for fine adjustment, magnifying glass and locking screw. Reading 0. 02 mm. Reading zero and marking scriber are adjusted with reference to the bottom of the base (marking out from “0”). Drawing dimensions can therefore be transferred directly without the risk of calculation errors. The scriber is carbide tipped and is longitudinally adjustable by 140 mm (e. g. where access is difficult). Slim design of the scriber for scribing in narrow slots. Ergonomic shape of the foot prevents collisions between the scriber and the hand.