Featuring RapidWire Compressionless Technology Jet Lube Housing. A high octane cable system optimized for today's brake and drivetrain systems. Truly compressionless brake housing used to be considered impossible to achieve.The special RapidWire housing delivers excellent compressionless performance for enhanced cable response. Boost braking of road brakes, cantilevers, linear pulls and mechanical disc brakes. Jet Lubed for smooth cable action. Includes Jet Lubed Shifter Housing, too. A COMPLETE KIT: Includes housing and cables for BOTH brake and shifting systems.The best upgrade for your shifters, according to Bicycling Magazine and VeloNews. Cable system includes housing and cables for both shifters and brake. Jet lubed compressionless housing for smooth cable action and less cable stretch.