Whatever you get, get ball-bearing slides. Ball-bearing slides will probably last you your lifetime, plus, they can hold a lot of weight and still open and close smoothly. Ball-bearings are worth the money. I just purchased two Kobalt boxes for $335 and these are suitable for any shade tree mechanic. Made by Waterloo which makes Craftsman among many others. Found Kobalt and Craftsman's models that I were looking at to be identical, but the Kobalt's were $100 cheaper for both boxes.