Watchdawg Locking Parking Brake Air Valve Knob - Chrome Plated

Watchdawg Locking Parking Brake Air Valve Knob - Chrome Plated

• PERFECT for any model rig, firetrucks, school buses, dump trucks, cement trucks, RV's, or any motor vehicle that has a standard SCREW ON yellow air brake knob.

• Remove the yellow knob and install the Watchdawg using one of the included adaptors.

• Pull the knob out to apply the brakes.

• Insert key and unlock, enabling the Watchdawg to slide back and forth.

• Reposition the Watchdawg against the dash and turn the key to lock. Locking the knob against the dash prevents brake release.

• Return the knob to operating mode by using the key to unlock, pull the knob to its outer position and re-lock. The brake valve will now operate normally.