A great way to start a bicycle tool collection! The SK-4 includes 15 high-quality tools to help home mechanics clean, adjust, maintain, and do some basic repairs on their bike. Also included is the BBB-4 Big Blue Book of Bicycle Repair, a comprehensive repair manual with clear step by step instructions, high quality color photos and useful charts and graphs to thoroughly explain and demonstrate hundreds of repairs. Packaged in a tough toolbox with tray insert and small compartments to protect your investment.