Features: Tensile Tested - Lug Nuts Undergo Industry-Standard Proof-Load Testing To Ensure Strength Carbon Steel - Materials Meet Sae Automotive Industry Standards For Strength And Durability Corrosion Tested - 72-Hour Salt Spray Testing To Simulate Three Years Of Corrosion Resistance Specifications: Color: Chrome End Type: Bulge Seat Acorn Grade Type: Regular Hex Size: 19 Mm Material: Chrome Open End Design: No Overall Length: 1.25 In Sae Or Metric: Metric Seat Style: Conical Seat - 60 Deg Thread Diameter: 12 Mm Thread Direction: Clockwise Thread Pitch: 1.5 Mm Thread Type: Fine Washers Included: No Wheel Lock Key Included: Not Required These Wheel Lug Nuts Are Made Of Carbon Steel And Tested To Demanding Automotive Industry Standards To Ensure Strength, Longevity And Safety. These Wheel Lug Nuts Are Made Of Carbon Steel And Tested To Demanding Automotive Industry Standards To Ensure Strength, Longevity And Safety.