(Redneck Trailer Supply) This bolt-on electric motor is a quick and easy upgrade, designed to convert the Binkley two-speed jack into a power jack, capable of lifting up to 6,500 lbs. at 7" per minute. In case of battery failure, the electric motor comes with a manual crank backup shaft (can be turned with a standard socket and ratchet, not included). Includes a mounting bracket harnessed switch box with built-in circuit breaker and electrical connectors. 9 1/2 " wide and can mount on either side of the Binkley two-speed jack. 3-year warranty. For use with Binkley two-speed jack only. Any other use will void the manufacturers warning.