This replacement cord installs easily onto older models of Foredom’s H.MH-170 Micromotor handpieces with Serial Numbers under 1001. 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.
Newer models of the handpiece with serial numbers of 1001 and higher use a similar cord- the HP4-174 – which has a thinner (smaller) end with 2-pins.