Park Tool 鏈條鞭 / 踏板扳手 (HCW-16.3)

The 15mm pedal wrench side has enough leverage to break loose stuck pedals, and the chain whip grips the cassette firmly without slipping. I've used it on two bikes already and the combo design saves real space in my toolbox.

Was a bit skeptical about a two-in-one tool, but the chain whip grip on this is surprisingly secure and the pedal wrench opened up a tough 15mm bolt on the first try. It's now my go-to for quick cassette swaps.

This combo tool is actually solid and fits nicely in my toolbox without taking up much space. Used the pedal wrench side yesterday and it grabbed the flats perfectly, no slipping at all. The chain whip feature makes cassette swaps a one-tool job, which is exactly what I needed.