Bon 21-101 Lewis Pin- 1/2-inch Diameter X 3 1/2-inch (Pr)

Lewis Pins are used to lift large stones with a crane chain block or winch. The pins are inserted into specially prepared holes or seated in the top of stone directly above its center of mass. Pins are liable to slip out of the seating if some of the weight of the stone becomes in-balanced. For this reason a safety sling should always be used together with the Lewis Pins.