The metric roofing carpenters square is designed for all roofing calculations and also the layout of stairs. Made from tempered steel, buffed and with a clear protective finish and has 15 tables for rafter cuts, roofing pitches and rises etc. It is metric only, measuring 600mm x 400mm, graduated every 2mm, figured every 10mm on both sides.
3 September 2017
it's not squareI've given this average ratings because I'm not really qualified to voice an opinion - in my ignorance I bought this for making square markings on wood, expecting the angle to be exactly 90 degrees. it isn't, and in fairness it never claimed to be in the blurb, so perhaps it's a given that it isn't always going to be an exact square. I'm probably missing something.