The primary functions of Luglock® are to:
Retain lug nuts within the ring structure to lower the likelihood of them loosening
Greatly lower the likelihood of lug nuts backing away completely from the wheel hub
Protect lug nuts from weathering, corrosion and road damage through covering each nut with a cap
Reduce the ingress of dirt and extraneous matter into the thread of the lug nut and stud
Visit the Checkpoint website for more information on US Spec Lug Nut Retainers