Low Profile Wheels: sleek low profile wheels for ultimate portability Ball Corners: Durable chrome ball corners with a 3 prong six rivet industrial anchor designed to provide protection against the rigors of heavy travel Rubber Feet: Industrial grade rubber feet attached with heavy duty bolts and t-nuts so your case doesn't experience to much travel rash. Spring Loaded handles: Recessed chrome and spring loaded. These handles flex to a comfortable 90 degree angle for an easy pull on heavy loads. Retractable so they never become an in the way issue for you or that unforgiving baggage handler. Industrial hinges: Super secure hinge with constant and even secure latching Industrial rivets: Double anchor industrial rivets to secure all hardware for maximum durability. Tongue & Groove fit: tongue and groove construction for a heavy duty locking fit. Sealed tight to keep travel grunge out. Case Construction: structurally rugged, strong & built to resist the punishment of travel. Industrial latches with adjacent padlock holes: Recessed chrome bi- position butterfly latches. Industrial grade with ten rivet anchor construction