This is brand new and a direct fit replacement mouthpiece for the LifeSafer Ignition Interlock Device. Easy replacment for muliltple drivers. Convenient to keep in your glove box or console when needed. Please check the model of your device before ordering to ensure compatibility. This is the mouthpiece only, the device is not included. No tools required to remove and replace the mouthpiece from the interlock device. Simply pull out the old mouthpiece and discard it.. Press new mouthpiece into the top of your Interlock Device by hand; do not force in.