Tama MCA63EN Cymbal Boom Arm

The metal clamp and boom arm themselves are good, quite easily adjustable and stable, but the quick set clamp that keeps the cymbal in place is rubbish. The little piece of plastic wears out quickly and after a while it will just pop off every time you hit your cymbal. I had to buy wingnuts separately just to keep my cymbals in place.

You're better off just buying a clamp/arm made fully of metal parts.