The Lock-n-Haul is designed to eliminate all of the clearance in the entire system and stop the motor from shaking at all. The Delrin ends of the Lock-n-Haul don't compress like wood does, and offers a solid connection like nothing else. This device continues to be the choice of boaters worldwide with nearly 8,000 shipped so far, and 116 retail dealers in 5 countries. Please visit the website and read the unsolicited endorsements, and find more details about how the device works.