Black Gorilla Locking Lug Nut Kit Available for all C5 & C6 Corvettes - Please Choose Option When Ordering! Closed-end design prevents rusting External socket pattern ensures better torque without breakage Bulge design provides more seating surface than traditional tuner lug nuts. Made of heat-treated steel. Ultra-strong chrome-vanadium steel key. Set includes 20 lug nuts and one key.