Attributes . 7' Blade Standout, Mylar(R) Polyester Film Extends Life of Entire Blade, Chrome High-impact Abs Case is Job Site Tough, Secure Blade Lock Won't Creep During Measurements, 16" and 19.2" Stud Center Markings Simplify Framing Jobs, Corrosion-resistant True-zero(R) End Hook for Accurate Measurements . Names