Clipper Oil is an essential tool for clipper mainenance. Use of Wahl Clipper Oil will extend blade life by reducting friction, preventing rust and corrosion. It will also help maintain correct blade speed and improve run tim of cordless clippers/trimmers. Wahl branded Clipper oil is a mineral oil perfect for clipper blades Use of the oil helps to "flush" cut hair from between blades and lubricates blades for cooler cutting and longer life Should be used every 10 minutes of clipper use ideally. At a minimum at the beginning of a clip and at the end of the clip. Directions for Use of Blade Oil:1. With the blade directed downwards, turn the clipper/trimmer on.2. Apply three drops of oil, one on each side and one in the middle.3. With the clipper/trimmer still on, move the taper lever back and forth to work oil into blade.4. Turn off clipper/trimmer and blot excess oil with clean towel.