Gitzo GK2580TQR Series 2 Traveler Kit Tripod Ground level set allows you to remove the center column to save weight and get the camera closer to the ground G-Lock locking mechanism gives faster operation and stronger, safer locking The rapid column can easily be inverted for an alternative shooting angle or low level macro work Anti Leg Rotation system allows loosening of all the twist locks on each leg at the same time for quick set up Removable rubber feet allows you to easily change worn out rubber feet or to fit other accessories, such as spiked feet or snow/sand shoes