The Empire Magnum Fat Boy 7 in. Aluminum Rafter Square is built from a solid extrusion that resists bending, breakage and corrosion. It accurately measures distances and angles and features stamped conversion tables with clear, easily visible markings. A thick, solid edge also makes it safe for use as a saw guide. The Empire em81.9 Magnetic Torpedo levels features e-Band vials that highlight the meniscus of the bubble to provide a clear reading at plumb, level and 45°. High visibility vial surrounds provide clear viewing of vials and a reinforced aluminum frame allow vials to be viewed from above. A magnetic edge frees the users hands when working with metal surfaces. The em81.9 is proudly made at Empire Level in Mukwonago, WI and backed by a limited lifetime warranty. This kit includes 1 rafter square and 1 torpedo level.