NSK S-Max M900L Stainless Steel high speed handpiece Optic Standard Head For NSK couplingNSK S Max M900L Stainless Steel high speed handpiece Optic Standard Head For NSK coupling. The new rotor shape was developed using a state of the art computer simulation and fluid analysis software. This rotor delivers a significant 6 W boost in power from 20 W to 26 W. The handpiece becomes an extension of the operator and provides a cutting feel that facilitates more intricate operations. Its elegant, slim design is replete with the expertise and