When making adjustments to your bike, the three most common hex sizes are 4, 5, and 6mm. Park Tool, being the savvy purveyor of bicycle repair equipment that it is, developed what's quite possibly the most iconic shop tool ever -- the 3-Way Hex Wrench. Known internally at Park Tool as the AWS-1,...

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Park Tool introduced the bicycle world to the 3-way hex wrench set over 30 years ago. Our 3-way wrenches fit perfectly in the palm of the hand and provide excellent leverage, making them a favorite of countless shop mechanics worldwide.

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