This manual clutch restores the functionality of the slow motion controls when the MT-1 motor is installed on the GP or GPD2 mount. The clutch has a knob that disengages the motor so that the manual control is active. Once the desired adjustments are made. the motors can be re-engaged by turning the knob. Compatible with Great Polaris, Great Polaris 2, Great Polaris D2, Great Polaris Economy, Super Polaris and Super Polaris DX Mounts; Weight 4 ounces boxed 2.25 x 1.5 x 1.25 inches