Not only stylish and lightweight the Bionic Lock Nuts actually help to maintain your bearing integrity over traditional steel lock nuts! Bionic lock nuts feature a flange that protects against denting bearing shields during removal and assembly of your quad wheels. Keeping your bearings in good condition – which keeps them fast! Bionic Nuts are made of 3M glass filled Nylon, with super strong threads to be long lasting nuts. Fits all standard 8mm (5/16") axles currently in use today. Complete set of of 8 Nylon locking-type Axle Nuts, in pink, green, red, black, yellow, and orange.