Practical adapter for bile bottle holders. If the drinking bottle does not fit into the bottle cage due to insufficient space in the frame, the CAGE SHIFTER comes into play. With its practical slotted holes, it allows the bottle holder holes to be moved 1.5 to 4.5 cm. Lets you move the holes on the frame. The practical adapter is made of sturdy and lightweight polycarbon. Thanks to its flat design, it is integrated discreetly on the frame. Once mounted, the bike bottle holder can be easily attached to the CAGE SHIFTER with the two screws supplied.