After 22 years in general practice, I've used them all. Metalift, Kline Remover, Dentoco pneumatic, and several others. The WAMKey is #1, perion. It's really ingenious and is just as good as everyone else that has chimed in about says it is. And it dose'nt cost that much. The only problem is... It's made in France. Buy it anyway and thank me later.J. Jerome Smith, DDSLafayette, La