Review on 🔒 Ultra-Fab Products 21-001090 Super Grip Chock - Secure Wheel Locking Device (1 Pack) by Matt Watkins

It is recommended to first expand them, and then put them between the wheels and tighten them. Then loosen just enough to loosen them so next time you can lock them in place with just a few turns. Much more stability and no trailer movements to the front and back, which used to be blocked with the front and rear wheels as well. That's great! I wish the included locks had the same keys!