Canopies all started with a square leg, these worked well and were very durable. Within the ast 5 years, new hex shaped legs proved to be 5x stronger and so we changed all of our aluminum frames over to this new style. Steel canopies did not follow suit and that was due to the cost of making the steel into a hex shape, well we have decided to upgrade our steel frames to the hex leg without passing on the additional cost to our clients. Stronger, more durable and the exact same cost, except for this month, you can save over 30% if you order a full digital, steel frame canopy in December!