The Gitzo GM2541 features the G-Lock leg lock system, where the more weight that is supported, the greater the strength of the lock becomes. The ALR (Anti Leg Rotation) system means that the Gitzo Monopod is quick and easy to operate. A reversible 1/4 or 3/8 inch connection thread means almost all cameras and lenses can be directly attached, and the rubber foot can be replaced by optional spike G1220.129B or G1220.129LB (extra long) for additional stability on softer ground.