The harder you pull, the firmer it wedges. Allows full 360-degrees of pull without chain touching floor. Can be removed and installed in a different location. When correctly installed, top is flush with floor when not in use. Can be easily cleaned by lifting top. 31/2" (89 mm) cored hole required in concrete floor.

Weight: 7 lbs (3.18 kg)
Capacity: 10 tons (9,072 kg)

Heat Treated Steel. Made in the U.S.A.