tightly packed structure light weight position jumping clearly stable contact good-looking shape digital encoding circuit used for oscillograph and other instrument Order Sample KX46&12W1D&P20&(RZS3.603.579) KX46:the type of the switch 12W:the bit of the switch 1D:the knife number of the switch P: shaft end type 20:the length of the shaft extension (RZS3.603.579):the serial number of the factory