Expert Quality, with front viewing Plumb Site® Dual View™ vials, horizontal vial and two vertical vials. Aluminium box section extrusion with milled top and base (except 1800mm), electrostatically powder coated and baked with polyester acrylic paint. Two nonslip soft grip handles (one on 600mm), anti-slip wall pads and cushioned end caps. Accuracy 0.5mm per 1M = 0.029° in standard position. Sold loose with display hanger.