Open-end acorn bulge wheel lug nut, thread size M12x1.25/ M12x1.5 ,hex 19mm (3/4 ), height: 21mm (0.83in) , cone/conical /taper 60 degree seat. M12 * 1.25 nut applicable model: Nissan Nissan Great Wall Haval Changan Suzuki Changhe Infiniti Subaru Renault, etc M12 * 1.5 nut applicable model: Hyundai Kia Jianghuai Mazda Benz Buick Chevrolet Cadillac Chrysler Wuling Baojun Ford Southeast Toyota Chang an Geely Chery Zhongtai BYD Dongfeng Dodge Honda Haima Huatai Gold Cup Lifan Mitsubishi ZTE, etc Material: These lug nuts are manufactured with cold forged and heat treated carbon steel for enhanced rigidity and durability, 72 hour salt spray tested to ensure corrosion resistance. Zinc paint will not fall off under normal use. Thread and Installation: CNC machined to ensure these wheels lugs with precise and smooth thread pitch, no hassle for destroying your studs/bolts. One-Piece design ensures safer driving, anti-cracking and more reliable than other two-piece designed lug nuts. Manual installation is recommended, DO NOT use electrical tools.