The are a lot of tools that fit under the umbrella "bicycle tools."
Figuring out which ones are necessary, what brands are reliable, and how to use even the simplest of tools can take a lot of time, struggling, and Googe-ing.
Unless you come to Bike Switzerland's "All About Bicycle Tools" workshop. Led by Jarda, a 20 year veteran of the bike business, you will learn about a few vital tools to help your workshop and your mechanical mind grow. Bring your questions and your friends!!