TrigJig | RSA180 Adjustable Rafter Square V2The RSA180 Adjustable Rafter Square is a precision roofing square with an adjustable fence. With enhanced features, we've designed it to be top of its class when it comes to design, build quality, usability and style. We strive to create only the best rafter squares in the UK using the highest quality materials and processes. ENHANCED ANTI WEAR To preserve and protect the precision of the protractor angles we CNC engraved these at the same time as