The pair of TracRac Locking TracKnobs (25700) are slick, theft deterrent lock knobs for locking the TracRac G2 sliding truck rack and Trac Rac UtilityRac utility truck rack systems to the vehicle. The Locking TracKnobs (sold as a pair & includes keys) attach quickly and securely, simultaneously locking the TracRac base rails onto the truck and also preventing the overhead rack towers & crossbars from being removeable or accidentally sliding off the base rails. Easy to follow Trac Rac Locking Track Knobs instructions included.
The top of each TracRac TracKnob spins freely when locked so that the truck rack cannot be moved or removed. To unlock, simply turn the key and the cylinder engages the knob allowing you to disengage the thread and move the racks.