EVA, 10,000 rpm optimal drive speed (20,000 rpm max. drive speed). To be used with Intensiv files (ORTHOstrips or Proxoshapes). 36 individual locking positions. For interproximal polishing, stripping, and preparation. Buffered stroke (protects soft tissue). Elevation: 0.8mm. Internal air/water coolant. 1-port spray. EXPERTgrip. Universal E type connection.