Includes 2 kingpin nuts and 4 axle nuts from Dimebag Hardware. The more you tighten/loosen your trucks and replace your wheels/bearings, the more the your nuts wear out and lose their ability to stay tight. These fresh new nuts will keep you locked up! Produced with top quality materials. The thread size for these axle nuts is 5/16". The thread size for these kingpin nuts is 3/8" (standard). The 4 axle nuts and 2 kingpin nuts included are enough to outfit 2 trucks.