What prevents the mailbox from getting smashed when the plow strikes it at high speeds?
If a snow plow is moving at high rate of speed, it is actually the snow flying off the plow wing that strikes the mailbox and assembly. This force is what causes the mailbox/arm assembly to swing out of the way before the plow blade hits it. It is possible for hard packed snow or chunks of flying ice to hit and damage a mailbox no matter what it’s mounted on. When we invented this device about 30 years ago, we installed an impact plate on the side of the mailbox to help prevent this.
