Handmade from genuine heavy duty leather for strength and endurance. Installs to the bike with ease. The special water resistant suede ensures that weather will have little effect on the bag. Heres what spaces it contains: 6 slots for Allen keys (hex keys), 10 slots for spanners / wrenches, 4 additional slots for pliers/ screw drivers and a zipper pocket for the rest. Dimensions closed: 17cm diameter x 27cm long. Dimensions open: 43cm high x 27cm wide.