... Brand new universal hydraulic BRAKE LOCK. ( DOT 3,4 + 5 including Silicone Fluid ) This brake lock will hold any vehicle ... Line-Out and comes with standard 3/16" brake line fittings & installation instructions. Black Anodized Aluminum ... in the knob on the Brake Lock, and let off the foot brake and it's locked. ... best for short term use Hydraulic BRAKE LOCK,LINE LOCK, Line pressure holds brakes,Cars,Trucks, ...