Jagwire's Pro Internal Routing Tool simplifies routing through a frame, using powerful magnets to safely and easily guide cables, housing, and e-shift wires. - A retractable, flexible magnet can be inserted into the receiving end of an internal cable run to find the magnetic adapter and easily pull it through - Adapters for inner cables, hydraulic hose, and Di2 e-Tube wires are included - The adapters nest neatly inside tool body when not in use