Greetings fellow fediverse bike-wrenchers; I want to talk about the Zyklop Mini today.
I love it and it's the best tool I've ever bought, bar none. With the (optional) bit check it stows nicely in a trousers pocket, apron, or ride bag/jersey pocket. It makes tightening up almost every bolt on most bikes trivial even when they're tucked nicely in some bullshit aero location. It lives in my 'everynday' bag, and it sees use almost every day. On rides I've adjusted almost every contact point on my bike with it. It even manages to deal with my brifter bolts in their almost stripped state.
Bonus points because it's also a great fidget.
Is it cheap? No. Is it worthwhile? Yes, very. I used generic 1/4" bits and bought the bit check case on eBay for pennies to save myself some pain.
What are your well-worth-the-money/never-leave-home-without cool tools?