The head of contra-angle can be replaced, it can equipped with high speed bur for finishing and polishing the filing materials Product Description *Unique design, internal cooling system, great chucking power, and button bur change type. *The head of contra-angle can be replaced, it can equipped with high speed bur for finishing and polishing the filing materials. *It also can equipped with polishing cup; easy to repair and protection. *Speed and direction adjustment. *Perfect structure design for stable atomization even in unstable hydraulic/ pneumatic situation. *Compatible with European brands. *Compare with external handpiece, it neednt external water pipe, environmental friendly, easy to sterilize, simpler, easier, and much more enjoyable. *High cost-effective, high security, high reliability, low noise and steady operation, stainless steel for water-blocking prevention.