Originally Posted by
Fahrenheit531
Mastergrip 10mm wrench with ratcheting end. It sees constant use.
...and tennis balls are surprisingly common.
Every time I ride, I pass by a tennis club where there are frequently balls that have gone over the fence, then rolled down the street in the gutter.
I used to stop and throw them back over the fence, but it has become so old that I don't even bother any more.