I bought a pannier bag which attaches to the rear rack with 3 quick-releases. Each quick-release has a sticker on it:

strange hammer warning symbol

What does this symbol mean? My guess would be something like "don't hit this with a hammer", but it seems rather unlikely that anyone would, so I'm really not sure what I'm being warned about.

  • If they need such stickers they have a usability problem.
    – starblue
    Sep 5, 2011 at 15:33
  • 2
    It's because the bag mfgrs support the "Ban Hammers!" movement. Sep 5, 2011 at 17:56
  • First thing I would remove! I hate dang stickers, especially stupid ones.
    – Moab
    Sep 6, 2011 at 2:59
  • 2
    Likely 1 person some time hit it with a hammer or other tool trying to latch it, cracked the plastic, had the bag break open, and tried to sue. Like 90% of 'warning' stickers on products, its probably just there to prevent liability. You can tell it was an afterthought, since the sticker is too big for the latch its stuck to, so some lawyer probably made them stick it on there well after they engineered it.
    – rally25rs
    Sep 6, 2011 at 19:58

1 Answer 1


It means "No tools" or "Use your hands."

  • Seems a pair of pliers would be more appropriate symbol for this particular case.
    – Moab
    Sep 6, 2011 at 2:57
  • No using a screw driver. Good luck!
    – Kalamane
    Sep 6, 2011 at 5:26
  • 1
    "Do not use while hammered." Sep 20, 2011 at 19:14

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