I LOVE THESE THINGS, and they are so easy to make!  If you have a saw (which I do) you can make the cuts yourself.  Otherwise, they will do that for you at Lowes or Home Depot!  My base is 12 x 24 inches, and the sides are made from 1x4's.  There are two pieces at 24 inches and two pieces at 10 1/2 inches.  Just screw the side pieces together to form a box and then lay your bottom piece on top and screw it to the side pieces from the bottom.  Flip it upright.  Now that you have your box, make the end pieces to hold the handles.
  These can just be from the 1x4's as well.  Cut them at about 10 inches long and taper the ends with an angle on the saw if you wish.  Then stack them up evenly and drill a whole near the top with a 1 in drill bit (for your metal bar to slide through for a handle).  Now attach them to the inside middle of the ends using screws.  You will need a metal rod at about 22 1/2 inches long. Measure from the outside of the rod for appropriate sizing (remember that your whole is 1 in.) Now push the rod through the ends.  If it is a bit too snug, you can file the inside of the whole with a curved file until the rod will slide in, but keep it snug.
  To finish the tool caddy I just used a vinegar and steel wool stain (more coming on that in a separate post), let that dry and then paint with white chalk paint and let dry.  Sand with a rotary hand sander until it looks as "antique" as you like and then seal with finishing wax if desired!  More on making arrangements for the box later!  If you have any questions, please feel free to ask!