The Stanley 30 ft. PowerLock Tape Measure with BladeArmor has all the features you need for precise measurements every time. With its Tru-Zero end hook, you can draw circles and arcs and framing a wall is made easy with 16 in. and 19.2 in. stud center markings. 7 FT. BLADE STANDOUT for routine, pro-grade measuring LONG BLADE LIFE with Mylar polyester film coating HIGH-IMPACT CASE DEFENDS AGAINST DAMAGE: Chrome ABS enclosure is jobsite strong NO CREEPING DURING MEASUREMENTS with secure blade lock SIMPLIFY FRAMING JOBS with 16 in. and 19-1/5 in. stud center markings CORROSION-RESISTANT TRU-ZERO END HOOK for dependable measuring exactness