These are HiTec HS-645MG Ultra Torque Metal Gear Servos for your Heavy Duty needs! The servos are made by Hitec. For Details see the datasheet. On all Hitec servos the Black wire is 'ground', the Red wire (center wire) is 'power', and the yellow (third) wire is 'signal'. This servo has a Hitec/JR connector which mates directly with a 0.1" 3-pin header. This servo comes with mounting hardware, servo arms, and rubber mounting grommets.

This servo offers 133.31 oz⋅in. (9.6kg.cm) of torque at 6V as compared to 52 oz⋅in for the HS-422 servo

To mount this servo to a flat surface see our servo hardware kit. We also sell scanner brackets to attach to the servos.

You can also select to get this servo modified servo for continuous rotation if you wish, or you can do it yourself.