I have six stackable plastic tool boxes about the size of a loaf of bread. One is labeled "S" for standard wrenches, one is "M" for metric, one is "A" for adjustable wrench's, one is left blank for screwdrivers. Two additional but different color's for electrical items such as meter, wires, fuses, crimper's, tape, etc. Oh, and a larger box for ratchets & sockets 1/4, 3/8's & 1/2 hammers, and assorted larger tools. I like the smaller boxes since they are real easy to get out and take them where I need them. I tried a larger single storage container but seemed like I had to keep going back to it to get a different size or different tool. The only drawback I see is the box I usually want is on the bottom and I will need at least two boxes for any job.