Online amazon.com/dp/B000RZFOIG/? Mile Marker Supreme Locking Hubs help to engage/disengage the front wheels from the front axle shafts, protecting the shafts from wear and tear. Made using a new process of die-casting aluminum into a pre-made stainless jacket, these hubs provide strength and corrosion resistance. Built to exacting standards, they feature three-quarter turn engagement, which is easier to engage than quarter-turn hub mechanisms. Use the store locator to find best price of Mile Marker 428 Supreme Locking Hub.