I used to have a car that spent a fair amount of time in the shop. During servicing I'd routinely ignore the NO CUSTOMERS BEYOND THIS POINT sign and walk into the garage to talk to the mechanic. Not because I cared about the car--I just liked looking at the garage's tool carts, which seemed to hold and organize an insane amount of tools and attachments.

I finally found the site of the company that makes those things: Montezuma Manufacturing. They make portable toolboxes, rolling cabinets and the chests that go on top, in both steel and aluminum. Their capacity and price--the large black cabinet pictured above rings in at $2,300, which is worth more than my car was--put these out of reach of the casual DIY-er, but it's interesting to see how the pros store their stuff.