Using this Klein nut driver is simple. Just pick it up by the cushioned handle, which gives you a good grip and allows you to apply more force. Match the 5/16' nut driver to the right nut and turn it. It's great for bolt applications, like working on stacked circuit boards or long - bolt setups. When using it, make sure to use it on nuts that match the 5/16' size to avoid any damage. Don't use it in wet or damp conditions as the non - insulated steel shaft could be dangerous. To keep it in good shape, wipe it down after each use to remove any dirt or debris. Store it in a dry place. If you notice any signs of wear on the chrome plating or the handle, it might be time for a replacement.