The Charge(R) Nylon Composite Water Bottle Cage makes it easy to bring your water bottle with you on your ride. It easily attaches to your bike's water bottle braze-ons with the use of a 4 mm Allen wrench. The sleek lightweight design looks great without weighing you down, and this cage can hold most water bottles. FEATURES: 4 mm Allen wrench needed for attachment Made to be lightweight Works with most water bottles