I have a 26" Craftsman Professional from Sears Canada.
All the labeling says "Made in Canada", so I suspect it's an International Professional Series box with Sears "Professional/Qualité Pro" plastic badges fitted. Was a surprise present from my wife, so I got no say in the configuration. While they are good heavy duty units with the drawers having latches and bearing slides, and better quality wheels, if I'd been shopping for myself, I would have bought a wider cabinet of a similar grade.
Top box is 18 inches deep by 21 inches high with the usual top section and 5 drawers. The bottom cabinet is 18 deep and 30 inches high, also with 5 drawers.
Top box:
Top: Misc **** (plus other drawer overflow) Won't photograph that as it's pretty nasty looking at the moment.
Drawer 1 (2") - Screwdrivers
Drawer 2 (2") - Pliers/Side cutters/Vice Grips
Drawer 3 (2") - Wrenches, nut drivers
Drawer 4 (4") - loose 1/2" and 3/4" drive sockets and accessories, torque wrench, torque multiplier, boxed impact sockets, boxed hand impact driver, stud remover, and a couple of 2 foot breaker bars laid diagonally. There'll be a lot more loose sockets added to that drawer soon, as my 1/2" drive 6 point socket collection is quite lacking. Hopefully, I'll be able to come up with a good socket organization system. The torque wrench needs to be relaxed to 50 ft lbs to neatly fit across the drawer.
Drawer 5 (4") - boxed Stanley 1/4"+3/8"+1/2" drive socket and gear wrench set. With the side latches removed and the front latches left open, the tools in the box are accessible without removing the box from drawer - It's my grab and run "Go Kit", so tools are always returned to the box immediately after they've been used, and the side latches take just a few seconds to refit.
Bottom cabinet:
Drawer 1: (4") - Shaping tools (files, hacksaws, cold chisels, smaller hammers, wire brushes, etc)
Drawer 2: (4") - Automotive specialist tools (boxed wheel hub set, boxed compression tester, OBD reader, disc piston clamps, brake bleeding stuff, etc)
Drawer 3: (4") - Jointing tools (soldering irons, solder, fluxes, epoxies, plastic welding stuff)
Drawer 4: (4") - More joining tools (boxed tap and die set, loose taps and dies, nutsert kit, pop rivet stuff) plus boxed die grinder that won't fit into the air tool drawer.
Drawer 5: (6") - Air tools
Yes, the tools aren't organized in the individual drawers, as I'm in the process of doing a drawer reorganization in an attempt to get a more useful layout. The house we moved out of last year, had a lot of pegboard and shelf space. That luxury I don't have at the new place, so a lot of stuff was jammed into the box for the move (not fun getting that box up a ramp of a U-Haul truck), and hasn't found another home yet. It does look like a fair bit of the stuff in the lower cabinet will be moving to dedicated "task" tool boxes.
Even so, I'm going to need more space in the cabinet, so I plan to find a mid-cabinet or fit it with a side cabinet. As I'm quite OCD, I want the cabinet addition to match (at least colour and style of drawer pull), so if I can't get matching stuff from Sears, then I'll probably get a mid cabinet or a side cabinet from International. A side cabinet will probably be more useful, but most of them appear to have been designed to attach to the taller 37" or so bottom cabinets. If I get something like
this, I'll have some adapting to do to get it mounted to the side of my 30" cabinet.
Stop that. This is 26" friction box territory, where you are space AND weight limited per drawer. 
That wrench drawer
Thought about upgrading anytime in the near future? 
