This is a set of saddle bottle cage and mount for use in triathlons. It securely attaches to the saddle rails, regardless of the type. The bottle cage has a stopper on the opposite side of the bottle from a standard cage, preventing the bottle from falling out due to vibration. Two dedicated tire levers are also included, which will be useful in an emergency. The bottle cage is fixed to the mount with two bolts, but the top bolt is stuck and won't come off. However, you can adjust the angle by removing only the bottom bolt, so it's perfectly usable.