A torque wrench is an important tool when it comes to tightening or loosening a bolt or nut. It allows you to apply a specific amount of force to the bolt or nut, which helps prevent overtightening or stripping. When it comes to axle nuts, a torque wrench is particularly important because these nuts are responsible for keeping your wheels attached to your car. If they're not properly tightened, you could end up losing a wheel while driving, which could be very dangerous.
Most axle nuts will have a specific torque rating that indicates how much force should be applied when tightening them. This information can usually be found in your car's owner's manual. If you don't have the manual, you can often find the torque rating online by searching for your car's make and model. Once you know the proper torque for your axle nut, use a torque wrench to tighten it to that specification. Be sure to check the nut periodically to ensure that it remains tight; if it starts to loosen, simply retighten it with the torque wrench.