Built-in Ninja 16+ This versatile bike accessory features a weatherproof toolbox mounted under the Ninja water bottle cage, offering multiple mounting options. It includes an interchangeable Cage Mount or can be used independently with a Frame Mount. The toolbox contains an 18-function mini tool, perfect for basic repairs and maintenance on the go. The Frame Mount provides additional mounting opportunities for Ninja Master+ Cage accessories. Included zip ties make installation quick and flexible, allowing for custom placement. The water bottle boss hole adds yet another mounting option for your convenience.