Maximum bearing weight is 2.1 lbs.Comfort grip handle.Super gimbal for smooth, accurate motion.Polished chrome counter-weight. DSLR can be used on the Steady Video Stabilizer with light lenses (up to 2.1 lbs total weight of body and lens) Connected to the camera's stud is the international general 1/4 stud，it can fit for universal cameras which have 1/4 screw hole. Mobile phones with a phone clip which have 1/4 screw hole can be used. The handheld portion is not fixed, slight shake is because the stabilizer is being fine-tuned. so it is a normal phenomenon.Balance: Red nut can be adjusted up and down, weight can be increased or decreased, the handheld part used to fine-tune, the three parts work together to adjust camera balance.