TracRac Locking Trac Knobs lock the rack system to the base rails. They are packaged and sold as a set with two thread protectors. Quick and secure attachment that locks the based rails to the truck prevents theft from the overhead rack tower and crossbars. The base racks will not be able to slide accidentally. Instructions are included with the product.
The slick, theft-deterrent TracRac Locking TracKnobs design adds security to the TracRac Sliding G2 TracRac Utility rack systems. The freely spinning knob top will not allow over racks to be repositioned or removed. A simple turn of the key unlocks TracKnobs. Threads are disengaged so that the racks can be moved.