The Leveling Unit II from Slik is an all-metal leveling adapter intended for use with most tripod heads and legs. The base allows the user to accurately level any head or camera within a +/- 7.5? range of movement and locks easily via a knurled control ring. The base's sturdy build allows it to support up to 22 lb while weighing a portable 7.05 oz. The base also features a single circular spirit level for making easy and precise adjustments.