Carlisle Brake & Friction's Concentric Slave Cylinders with integrated mechanical park brake, provide a high performing service and park brake actuation function in a single cost effective unit. Its compact form factor fits directly to the axle housing, eliminating external linkages. The fully enclosed housing provides superior environmental protection and eliminates wear points associated with traditional service and parking brake linkages. The integrated park lever features a highly efficient cam mechanism, while the removable cap is designed to simplify vehicle service and adjustment.