A clean trainer is an effective trainer. Use this disc extractor to remove the Aluminum disc on the side of the NEO 2T Smart trainer to check the inside for residue and to clean, if necessary. This tool is specifically designed to open your NEO 2T while keeping you within the terms of your warranty. To use this tool, you’ll need 4 mm and 5 mm hex keys and a 24 mm wrench. Three screws are included to fasten the NEO 2T disc extractor to your NEO 2T.