Safely measure vertical heights with this measuring stick that is 100% tested per OHSA and ASTM F711. Light weight and easy to store. Extends to 35 feet and retracts to 65-3/4". Measure overhead lines, highway clearances, structures, bridges, and more. Eye-level reading with no calculations required. Red graduations marked in feet and inches and sealed to prevent chipping and peeling. Positive locking buttons are spring loaded and allow fast easy extension and retraction.