This replacement cord installs easily onto current and newer models of Foredom’s H.MH-170 Micromotor handpieces with Serial Numbers of 1001 and higher. To install, unscrew protective back cap of handpiece, slide it all the way down, and remove. Pull the cord set out of the exposed handpiece and insert the end with 2-pins into opening. Slide protective cap over cord and screw back on.
Older models of the handpiece with serial numbers lower than 1001 use a similar cord- the HP4-173 – which has a thicker (bigger) end with 2-pins.