Consists of 1 larger rotator pan lock knob and 2 smaller detent plunger knobs attached with retaining wire.
I had to buy a new one due to my leaving my tripod in the car for a few days and not tightening the knobs. The bouncing around in my car cargo area broke one of the knobs. The tripod head and knobs are great products. I love the solid click of the knobs falling into place each time I turn the tripod head. Very solid construction. I would gladly buy this product and I have recommended this to other landscape photographers.