I've manged to fit so much stuff in this box...2 impact drivers and two drill/drivers along with 3 chargers in the base, the middle tool tray has all my wrenches, sockets, hammers, spanners, screwdrivers, torque wrench etc and in the top there's a rotary drill, small car battery charger, cased gas soldering iron, drill bits, a box of sanding discs and so on. The little sections on either side of the top box has space for odd bits and pieces. It's heavy obviously so being able to wheel it around is handy. Somebody complained about it being impossible to use like a trolley, I suspect they put the top section on back to front and/or maybe didn't lock the handle in place?! If you get it the right way round and ensure the larger of the two handles is locked with the smaller carry handle it works perfectly well. It might be a struggle if you're very tall but for the average height person it's fine. A worthwhile space saving and convenient purchase for me that appears plenty strong enough. Read more