The high performance 125mm large casters are equipped with removable cable guards. The casters has a track lock mechanism which allows users to set and move the dolly in three different modes: Free Mode, Tracking Mode, and Steer Mode. The caster's locking sound is minimal. Air pressure can be easily checked with the air pressure meter. Not only compatible with Libec heads but other brand heads as well. With optional accessories, ball based heads can also be attached on this pedestal. Upper column friction can be adjusted to preferred settings with the drag knob.