The Park Tool Internal Cable Routing Kit is a dream to those of us who love the clean look of a frame with internally routed cables, but feel a headache coming on just from the thought of routing the cables ourselves. No longer will you have to awkwardly fish cables through frames, getting hung up on sharp corners, and caught on internal frame obstacles, while hoping to land in the right spot-- with the Internal Cable Routing Kit your life will be simplified. The kit works by attaching a cable with a magnet on its end to your shifter or brake cable, to slide through your frame, guided by an external magnet, pulling the cable smoothly through to the exit port, or feeding two magnet ends together for a smooth pull through. The kit includes four plastic coated cables that are 250cm in length, with attached magnets on the end, a super-powerful external magnet for guiding the cables, and unique fittings for different styles of cables, including hydraulic brake lines, shift and brake housing, shift and brake cables, and it includes rubber adapters enable routing for Campagnolo EPS, and Shimano E-tubes for electronic shifting. The system works on carbon, alloy, and titanium frames, but will not work on steel frames.