Skunk2 Racing lug nuts are forged from super strong AL7075 aluminium/magnesium alloy and hard-anodized with knurled ends for better grip. Skunk2 Racing lug nuts are ultra-lightweight and strong and have been proven in all forms of racing. Use with Skunk2 Racing extended wheel studs for best performance. M12 x 1.5 & M12 x 1.25(INDIVIDUAL).