Here's an idea I had this past weekend on how to organize body hammers and dollies and reduce the clutter on the workbench. It was aggravating having 3 or 5 different hammers I needed but in the way laying on the table. Also gives a place to store dollies.
It's 8" wide, 19" tall, the slots for the handles are about 1.5-1.625" wide.
top is made of 1/4" round, post are 3/8" round, bottom is 16ga sheet with 1/8"x1/2" sides. Length I'd make the tray probably 10" and the rack on top 14 or 15" to have plenty of room... mine's a little smaller (and full) but I sure wouldn't go shorter than an 8" tray and about 11-12" rack.
Before
http://rides.webshots.com/photo/2578824430080251109KlFrskThe solution
http://rides.webshots.com/photo/2714539850080251109oAzmzgAfter
http://rides.webshots.com/photo/2644841830080251109yKuZMaIt's got a handle of sorts on top and is easy to move around, take them to the work.
Grigg