
Need a stopper to know how far into my boat/trailer garage (because the gap between the main garage door and the back wall is less than 6 inches. Once the blocks are installed, the trailer won't move an inch! The blocks don't move! Don't move an inch! Doesn't skid an iota when the tires make contact with the blocks (so the outboard doesn't go through the wall!) I love that I can stow the boat after each ride alone without insurance Very high quality blocks and ropes smoke