Expert Quality with unique front viewing 'PLUMBSITE'¿ vial. Heavy cast aluminium trapezoid-shaped level specially manufactured to withstand the impact of tapping with a hammer. Base milled to give accuracy of 0.5mm per 1M = 0.029° in standard position. Fixed all-round impact resistant horizontal and 'PLUMBSITE'¿ vials. Hang holes at both ends. Manufactured for Draper Tools by Kapro. Sold loose with display hanger.