Metric steel rafter/roofing square Features & Benefits This Steel Rafter/Roofing Square has a body length of 600 x 50mm and a tongue length of 400 x 8mm Embossed graduations and figures on work-hardened steel for durability and long life Metric roofing table Buffed finish with a clear lacquer that resists rust Product Specifications Length[mm]: 508 Height[mm]: 2.08 Width[mm]: 204 Weight[kg]: 0.6985322498