Specifications:
Thread Size: M12 x 1.25
Type: Closed End
Style: Spline ET
Kit Type: 6 Lug
Length: 36 mm
Length: 1.42"
Finish: Black
Features:
Nanoshield coating delivers extreme durability
Triple nickel plating further protects the life of lug nut
Cold forged and heat treated for superior hardness and durability
Two-piece construction
All RHI lug nuts are made of 1045 carbon steel and heat treated to 10.9 grade hardness more details on - https://www.carid.com/rhi-automotive/black-e-t-ultra-seat-spline-closed-end-lug-wheel-installation-kit-mpn-8747k6et-b.html