Despite its low price, one shouldn't count this ballhead out. It weighs 390g and feels very sturdy, unlike those flimsy ballhead that won't stay in position. When you locked QZSD-03 ballhead into any position, it stays firmly without wavering.
With 3/8" female screw thread underneath, you can mount this mini ballhead to a slider or boom arm which features 3/8" male screw.
There are 3 locking knobs:
1) one knob allows you to swivel the ballhead 360 degree for taking panoramic shot.
2) the second knob allows you to set the ballhead to landscape or portrait mode.
3) the third knob allows you to set the tension of the ballhead movement when you adjust the second knob, very usEFul when you want to have minor ballhead movement for precise positioning of your camera.
Other well known brand of the same ballhead quality would have cost more than $100. Qzsd-03 ballhead at $35 is a steal.
Model: QZSD-03 ballhead
Max height: 10cm
Max load: 8kg
Camera screw: 1/4" Male
Connector: 3/8" Female
Ballhead with damping system
Built in bubble level for precise positioning
Quick release plate