Park Tool IR-1. 3 Internal Cable Routing Kit An internally-routed game-changer For certain bikes with internal cable routing, installing new cables and housing can be one tough task. Luckily, the Park tool IR-1. 3 Internal Cable Routing Kit is a complete game-changer-making quick work of fishing cables, housing, electronic shifting wires, and hydraulic brake lines through the awkward bends of certain internally-routed frames and handlebars. This kit uses a clever magnetic system, with five coated wires with threaded fittings and rubber adapters to securely hold the ends of all types of cables as they are fished through the frame. A standalone reverse polarity magnet helps with guiding the wires through the frame from the outside. All this means less frustration, easier service, and less potential for damage as you perform essential service on your internally-routed frame or handlebar. Features Five coated cables with various threaded or rubberized adapters to secure the ends of all types of cables as they are fished through the frame Compatible with various types of cables and housing including shift cables, shift housing, hydraulic brake lines, or electronic shift wires Works on internally routed frames and handlebars to make quick work of complicated jobs Standalone reverse-polarity magnet helps you guide the wires through the frame from the outside | Park Tool | Ir-1. 3 Internal Cable Routing Kit Ir-1. 3 | Rubber