Hex keys or Allen Wrenches are a musthome toolset because a lot of assembly jobs will require such a pervasive tool. It's easy to use, lightweight, and gets the job done. There are variations of this tool, such as ball end hex keys and T handle hex keys. You'll want one of these around if you're installing a screw or a bolt that has a six sided socket in their head.
Common Hex Key Uses
This tool is reversible because either end can be used to insert into the bolt or screw socket and it comes in handy more often than you think because it's such a cheap and pervasive tool. Think back to all the Ikea furniture you've assembled, they usually require a hex key of some sort. They usually come coated so that they'll be rust and scratch resistant. They can be used directly on small bolts, headless screws, and some regular larger screws, it's just all in the sizing. The top tool brands that sell hex keys are:
* Eklind Tools
* Klein Tools
* Allen Tools
* Wiha Tools
* Bondhus Tools