Expert Quality, with front viewing Plumb Site® Dual View™ vial and 'I' beam vial. Manufactured from hardened aluminium electrostatically powder coated and baked with polyester acrylic paint, milled top and base and rubber end caps. One horizontal and two vertical vials, one of which has a front viewing Plumb Site® Dual View™ vial. Accuracy 1mm per 1M = 0.001° in standard position. Manufactured for Draper Tools by Kapro. Sold loose with display hanger.