Expert Quality, with highly visible red Opti-vision™ tilted vial which allows single bubble view over 90° and front viewing Plumb Site® Dual View™ RedEffect™ vial. Aluminium box section extrusion with milled base (not 1800mm), curved top, electrostatically powder coated and baked with polyester acrylic paint Ergo Grip™ nonslip soft grip handles, tough bi-material end caps, anti-slip wall pads and vertical vials. Accuracy 0.5mm per 1M = 0.029° in standard position. Manufactured for Draper Tools by Kapro. Sold loose with display hanger.