Draper post level draper 69555 unique tool to plumb pipes posts levelling rsjs and other applications where vertical or horizontal is required the hinged body opens to any angle and allows use on square round and hexagonal posts as well as girders rsjs dual fixing elastic straps for non magnetic surfaces and magnets for steel fence posts rsjs etc plastic construction with acrylic vials size 188 x 133mm accuracy 1 75mm per 1m 0 1 176 manufactured for draper tools by kapr