Looking for something a little more solid? The 8524 model is similar to the 8424 model with the exception of an increase in steel gauge. Dents, dings, and accidents can happen, its just the nature of the beast. Installing the CraftMaster 8524 garage door will protect your garage door fortress, with an extra layer of protection and weather insulation. For heavier garage doors we recommend a 30,000 cycle garage door spring for added lifting power, and a longer garage door lifetime.