SHINWA 65194 Telescopic Measure One Direction II D 13 shaku 5 sunExpands three times in length and can be read off at hand. Easy one person use. Plastic end will not scratch walls and ceilings Hang by attached hook for outer dimension measurement Bold, easy to read graduations Ideal for measuring ceiling height without switching hands One touch stopper lever adopted to significantly improve durability and ease of locking Tape at the back can be used for marking and notes Large caps on both ends and graduation close