Made of industrial steel for hardened longevity the Park Tool Stubby Hex Wrench Set will likely outlast your favorite bike and all of the tools in your garage work space as backed by its excellent limited lifetime warranty. The Stubby Hex Wrench Set includes 1. 5 2 2. 5 3 4 5 and 6-millimeter hex wrenches with an L-shaped design for greater leverage when you're tightening and loosening bike components.