Magnum Rafter Square, 12 in. Marking and Layout Tool | 3990

3990 MAGNUM RAFTER SQUARE, 12 IN Solid aluminum extruded square will not bend or break Includes conversion tables that are stamped Mark or cut boards up to 12 in. wide Thicker frame design ensures safe use as a saw guide Graduated notches for pulling layout lines Includes helpful instruction manual with complete rafter tables