Stanley 33-800 30 MaxSteel Tape Rules Reinforced With Blade Armor Coating Blade Armor coating is a patented industrial thermoplastic coating applied to the first 6" of this MaxSteel Tape for maximum durability and reduced blade breakage The heavy gauge steel blade features a patented selective "cross curve" technology for 8' + stand out Blades have high contrast color easy to read in all light conditions Mylar polyester film coating extends blade life 16" and 19.2" stud center markings on blade for framing purposes