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  • Securely holds the slotted nut to prevent spinning when tightening or loosening the bolt
  • Double-ended to fit most slotted-type nuts, including the Campagnolo® chainring nuts

Made in USA.

View all Park Tool Drivetrain Tools

REI membership


Best Use Cycling
Material(s) Steel
Dimensions 6.35 x 3.8 centimeters
Weight 19.6 grams
Rated 5 out of 5 by from Made the job fast and easy Fit perfectly in the chainring nuts, and was inexpensive. Made the job much easier to do, get this instead of trying to hold the nut with a big flat tip screwdriver
Date published: 2014-06-20
Rated 3 out of 5 by from Kinda Cheap It's hard to trash a [$] item but why not make it more substantial and charge a bit more money? Tools should be made to last. I bought this since there were not many other solutions and I could pick it up when I went by my local REI store. If you have to pay for shipping, look for something else.
Date published: 2009-12-15
Rated 3 out of 5 by from doesn't fit Had to use a dremel tool to widen the slot to fit. Unfortunately, seems to be nothing else in the market.
Date published: 2012-06-11
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