Tie Down Complete 12" Hydraulic Drum Brake Installation KitThe Tie Down Complete Drum Brake Installation Kit comes with everything you need to replace a hydraulic drum brake system on your boat trailer. Features: Drum brake assemblies have corrosion resistant components with GalvX finish.; For use with 1-3/4" x 1-1/4" tapered spindles; 6 Stud with 6 on 5.5 bolt pattern; Hydraulic brake actuator features Drop n Go Auto Latch Coupler; Kit Includes: Model 660 disc brake actuator; Brake lines for a single axle trailer; Left and right 10" drum brake assemblies; Two Pre-assembled and pre-greased 10" drum hubs;