Stash this compact tool in any backpack or saddle bag to always be prepared for on-the-go bicycle repair! This handy tool has 16 in one for different uses and include: 2mm allen key, 2.5mm allen key, 3mm allen key, 4mm allen key, 5mm allen key, 6mm allen key, square socket ...Stash this compact tool in any backpack or saddle bag to always be prepared for on-the-go bicycle repair! This handy tool has 16 in one for different uses and include: 2mm allen key, 2.5mm allen key, 3mm allen key, 4mm allen key, 5mm allen key, 6mm allen key, square socket extension rod, 8mm hex, 9mm hex, 10mm hex, Phillips head screwdriver, flathead screwdriver, 8mm open end wrench,10mm open end wrench, 15mm open end wrench, 14GE spoke wrench. A great gift for a cyclist.