Crain 510 Lever Extension Tube
The Crain 510 Lever Extension Tube top hand lever permits fast extension or retraction of the tail. The bottom floor lever unlocks when the stretcher head is lifted off the floor, allowing the head to be extended or retracted. Reduces back twisting necessary to activate the buttons of an Auto-Lok tube. Works with other Junior Power Stretchers with standard size poles (1 3/4" inside diameter). Closed length: 2 foot 10 inches. The range of useful length adjustment: 2 foot 10 1/2 inches to 4 foot 8 inches. Net weight: 7.82 lbs.
See YouTube video.