Using the DeWalt DWHT55518 flat bar is easy. When you need to pry something, use the extra - wide end. Place it under the object you want to lift and apply pressure. You'll get great leverage thanks to its design. For pulling nails, use the pointed and beveled end. Just insert it under the nail head and pull. The multiple nail pullers on the bar give you options depending on the size and type of the nail. When it comes to maintenance, after each use, wipe the bar clean with a dry cloth. If it gets rusty, you can use a bit of oil to prevent further corrosion. Store it in a dry place to keep it in good condition. Always be careful when using the bar to avoid any injuries. Don't apply excessive force that could damage the bar or cause it to break.