No matter the project, if it involves nuts and bolts, you need a socket set. Sure, wrenches can be handy, but really, how much energy and time do you feel like wasting? These socket sets range from bare-bones entry-level to professional grade, so no matter your skill level and budget, one of these kits will do the trick.
Ratchet and socket sets provide ratchets and several socket sizes.
Mechanic tool sets (image to right) often provide socket and ratchet sets plus tools such as wrenches and pliers.
Options range from smaller 11-piece sets to collections with 300 or more pieces.