The KaVo 635 B Fiberoptic High Speed Handpiece
replaces the 642 B model with a little better turbine which operates at a lower speed which makes it quieter as well. Can be used with Multiflex Lux 465 LRN or 1390 Coupler. Both couplers have anti-retraction valves, and 360° swivel. Handpiece contains an automatic air regulator valve that senses line air pressure and automatically reduces it to the correct 34 psi. This allows all handpiece hose pressures to be set at the higher air pressures required for slow-speed handpieces. 12.2 Watts power, 2.8 ounces total weight, 337,000 rpm speed. Kavo utilizes one of the best autochucks in the business with a carbide insert.