Threaded shaft with Allen bit setting. Makes opening and closing the trolley to fit a beam ultra quick and convenient. Using a drill fitted with an Allen bit, simply work the trolley open and closed. Removes the need for collars/ spacers. This design provides best in class headroom and accommodates wider beam flanges.
Comes with 8 Ft. Moves loads on a beam through the drive of a gear, controlled by the hand chain.
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