It is designed for balancing your shoulder mount rig to relieve you from the heavy rig. Make your photography more convenient.
It is made of aluminum alloy and very stable.
It fits 15mm industrial standard rods, center to center is 60mm. So it is versatile on industrial standard shoulder mount rig.
If one counter weight is not enough, you can use a screw to put on another one up to 4.6lbs/2.1kg. Or you can take down one counterweight down to 2.5lbs/1.1kg if it is too heavy.
Fast and simple to install. Note: Camera and Filmmaking Shoulder Rig Not Included