88-012/WTS-50 Features: -Calibrated to +/- .020 at crossing and top to bottom, insuring accuracy, especially on longer 48" cuts.-Crosshead is angled for added strength and durability.-Aircraft alloy steel rivets.-Reverse ruled blade for precise measurement in either direction.-Rule is marked at 16" for making stud measurements.-1/8" x 47-7/8". Construction: -Heat-treated aluminum construction is long lasting and gives metal it"s spring or "memory". Color/Finish: -Anodized finish helps prevent rusting, extends life of print.