The Heininger Opal Blade drive/Lever is a replacement part for the Heiniger Opal cordless clipper. It is the black plastic lever that moves the cutting blade back and forth, allowing for a smooth and precise clipping experience. The blade drive/lever can wear out over time, especially if the blades are not oiled regularly or are too tight. This can cause vibration, noise, and reduced performance. To keep your Heiniger Opal clipper in optimal condition, it is recommended to change the blade drive/lever periodically. The Heininger Opal Blade drive/Lever is easy to install and compatible with all Heiniger blades.