12" ALU Rafter Square

12" Aluminum Rafter Angle Square With Manual, Solid Aluminum Cast Body With Exclusive Computerized, Numerically Controlled Machined Edges, Permanent Molded Graduations, Scribe Notches Starting At 1-3/4" Transfer Outside Increments From Pivot Point, Low Glare, Protective Powder Coat Finish, Complete Instruction Manual Included.