Just because - maybe pick up an extra to keep spare somewhere. Not for just lost but one person I know had the spline socket break trying to get the heavy impacted lug nuts off. Yup that happened roadside to him on a trip. After finally getting them off a day later when stores opened he said F that, let them steal them and put regular lugs back on.Very observant! They're Gorilla Locks. Each lugnut is a spline style lock.