Single leg lock - one twist locks all leg sections. Two section center column - provides additional height. Accessory mount - 3/8"-16 accessory mount is built into the spider. Universal head attachment - 3/8"-16 thread on the top platform of the center column allows you to mount any standard photo head with the same thread size. Carrying case - a padded carrying case is included. This Holds your tripod Accessories such as an extra quick release plate and protects the tripod.