Once locked, the locking knob spins freely and cannot be removed, securing the Hi-Lift Jack in the mount.
There are two size locking knobs available one model (HM-LK) fits Hood Mounts only. Once tightened, the locking knob can be locked with the provided key.Safe lock, protection for Hi-Lift Jack;Works with several Hi-Lift mounts;1/2 inch bolt;Replaces an existing knob or wing nut;Once locked, the locking knob spins freely and cannot be remove;California Residents: WARNING Adjustable tube mount, 4XRAC, or LOC-RAC owner. The other model (VERS-LK) fits Adjustable Tube Mounts, 4XRACs, and Loc-Racs.