TracRac Black G2 Sliding Base Rails by Thule. 1 Pair. Lock your racks to the sliding rail to prevent theft or unauthorized reconfiguration with these locking knobs. When locked, the knob simply spins freely without loosening. Includes 2 knobs and 2 keys.

Stainless steel threads
Plastic knob
Supplied with 2 keys
Spins freely when locked
Prevents theft of racks

Length (cm) 196.9
Width (cm) 10.2
Height (cm) 4.8