Genuine GM OEM 37.5mm 2009-2024 Wheel Lug Nut 9597846. This is 22mm-7/8 size lug nut. Fits multiple Chevrolet GMC Cadillac model vehicles. CT4 CT5 XT4 ATS CTS SRX Camaro Corvette. Take off from new cars. Some will have marks from being removed. It happens. Stainless steel. Thanks.