A great combination of tools to help a home mechanic clean, adjust, maintain, and do some basic repairs on their bike The SK-4 includes more than 15 genuine Park Tool products that can perform dozens of tasks, and includes a custom Park Tool toolbox with extra room for spare parts and more tools Kit includes: AWS-10 Fold-Up Hex Wrench Set BBB-4 Big Blue Book of Bicycle Repair CC-3.2 Chain Checker CN-10 Professional Cable and Housing Cutter