As wheel bearings weaken and begin to fail, often a metal on metal grinding noise can be heard followed by jerking and wandering with steering. In severe cases the wheel can separate from the axle while driving causing costly repair bills. Wheel bearings have a tendency to go in pairs, meaning when your left bearing goes, the right is often not far behind it. This complete kit allows you to replace your wheel bearings at all four corners on your vehicle?and stop worrying about grinding metal noises.? Ever replace a failed wheel bearing just to have the other side go back the following week?? ?Replace all four corners and alleviate this worry.?