This hand piece has the tiniest head in the dental industry, yet most durable and highest performance. I personally use 7 of them in my busy endo practice, and never needed any maintenance or repair as long as I oil them after each use!! The only competitor is W&H 8:1 which has a bulky huge head making it useless in the molar area! I had to switch all my W&H HP to this smaller head one at the beginning of my Endo practice years ago; when I realized the great benefit of this one. I’m still surprised how the French could make a push button without sacrificing the tiny size of the micro head!!