• Parallel jaws are better for nuts and other square surfaces you don't want to marr or damage. Serrated jaws are best best for stubborn b*stards that you just want to get off no matter what and are maybe already rounded.

  • Second that.

    The parallel jaw Knipex (on the right) are the go to choice for pro mechanics. As you squeeze harder they grip the flats of the nut giving a much more secure grip. A million times better than an adjustable spanner.

    I have seen bearings pressed into swingarms with these. :)

    They're pretty expensive if buying retail but once you get used to them its easy to justify. I've ended up with 5 different sizes now and duplicates for the edc kit.

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