The DEWALT Steel Long Tape Measure has a 12mm steel mylar-coated blade with both metric and imperial graduations. The blade is corrosion resistant for added durability. A dirt removal window makes it easy to keep the tape clean and free from debris. The long tape's stainless-steel crank arm provides durability for demanding job-sites.  A blade-release button and a 5-to-1 gear ratio for fast blade rewinds for efficiency. It also features a spring-loaded carabiner attachment offers great portability.Specifications:Blade Length: 30m/100ft.Blade Width: 12mm. Ref: UTTK7627