Shimano FD-3303 is a high-performance front derailleur designed to provide smooth and precise shifting for triple chainrings. It features a dual-control lever that allows for easy shifting without having to remove your hands from the handlebars. The FD-3303 is compatible with Shimano's Total Integration (STI) system, which allows for integrated shifting and braking controls. It also features a wide range of adjustment options to ensure optimal performance with different frame and chainring combinations.