1 x DEWALT Rafter Layout Square 7in. The DEWALT Rafter Layout Square has an extra-thick, extruded aluminium body that holds up to heavy-duty use, ideal for use as saw guide. With stamped-in contrasting colour graduations for better readability. The fixed large base helps provide better grip on materials. It also features scribe line notches for marking rip cuts. Easy to use, a pivot point makes marking out angles easy. With scales of top cuts; common jack rafters, hip and valley rafters for versatility.