Stanley FMHT33706W Fat Max Keychain Tape Rule, 1/2-Inch by 6-Feet 1/2-inch wide blade with 3-foot blade standout, 16-inch and 19.2-inch stud center markings for quick measurements Tru-Zero end hook gives accurate inside and outside measurements Slide lock holds blade securely in position High-impact ABS case with rubber for comfort "W" model number denotes packaging style