The Stanley Hand Tools PowerLock tape and utility knife is coated with Mylar polyester film for added durability. Coated with Mylar polyester film for added durabilityFurnished with 3 heavy duty bladesHeat treated spring for longer lifeCorrosion-resistant Tru-Zero end hook for accurate measurementsTop edge major scale numbered in consecutive feet. Minor scale numbered in consecutive in. after each foot16 in. and 19.2 in. stud center marking on blade for framing purposesPatented interlocking nose to hold blade securelyUtility knife has interlocking nose to hold blade securelyBlade storage in handle7 feet blade standout