For their strength and quality, these suspension files are a bargain - and half the price I've seen elsewhere. Guaranteed for 10 years too. No more sagging, ripped files hanging off the runners. These will hold masses of stuff without drooping. I decided not mess with cheap, flimsy imitations. These are the real deal, as sold in office equipment stores like Staples. With my new Bisley filing cabinet - a bargain from Amazon which also arrived today - I am chuffed, at last, to create a quality filing system.