Dedicated Security Hardware: This set includes 4 wheel security bolts and 1 removal socket so you can replace missing wheel hardware and keep the dedicated service pattern ready for regular maintenance. Flat Washer Seat Fit Check: The flat washer seat profile and 12x1.50 thread help confirm the correct seat profile and thread size before wheel replacement, tire service, or maintenance scheduling. Service Friendly Removal Socket: Each fastener uses a dedicated removal socket, helping installers handle wheel maintenance with the paired service tool instead of relying on a standard wrench alone. Driven Replacement : The listed shank diameter, shank length, overall length, and wrench size give you practical checkpoints when comparing existing wheel hardware before purchase. Finish Steel Build: Heat treated alloy steel with a plated finish gives this 4 piece wheel security set a sturdy metal structure for everyday replacement use and routine wheel upkeep.