There’s something that no trailer can do without. No, it’s not tires, lights or brakes; it’s the trailer tongue jack. That’s the device that lifts and drops the trailer’s tongue so you can get the hitch ball underneath it to connect the tow vehicle to the trailer. Large or small, new or old, every trailer needs a smooth, easy to operate trailer tongue jack. If yours is old, rusty, and hard to crank, it’s probably time to invest in a new one.