Multiple layers of external storage makes space more organizeable and accessible so you can quickly find what you need, when you need it. Rigid support tub in the main walls of the bag make this the most protective soft sided bag in the Cramer line. Supports over 150 lbs. of pressure from end to end! It also helps the bag keep its shape and keep it looking new. Rounded corner design gives a large square bag a more aerodynamic and sleek look and makes for fewer corners for increased durability. Black nickel finish handle system with ultra durable ,oval shaped support pipes. Wide set anti-tip wheels keep the bag from rolling over on its side. They also double as protectors for the lower corners which are the highest wear areas on wheeled kits.