These designs are designated for placement on streets with a speed limits above 35mph. Cantilever design allows for unobstructed (no bracing under mailbox) access to snow all the way up to the post. The advantage in keeping your mailbox accessible during the winter months is substantial. Point forward post configuration allows for improved deflection of snow and other debris. Having a full 2 X 8 underneath prevents snow from popping the mailbox off as the snowplow goes past. They have been tested in the harshest of rural conditions. No need to build walls to protect them, they are guaranteed to stand straight for 5 years! For an inexpensive, durable and innovative design, they look great too!!! Installed price includes installation within a 25 mile radius of Three Oaks, MI.