Once mounted on my little boat, these wheels are very nice and help me push it up along the sand to water's edge. But, I've done a lot of assemblage with badly translated instructions, but these are beyond terrible. Also, one of the pins used to let the wheels fold up and down is useless since it falls out too easily, and then is also hard to re-insert because it's folding locking mechanism gets stuck inside the wheel mount and requires plain luck to extract. I ended up using zip ties to keep it from unlocking.