Piano Tuning Mute Kit Set of 6 Tools - 5 Year Warranty! Made with High Quality Rubber which is Flexible and Soft where Necessary but Ridged enough. Stay in Place. Will NOT loose off. Easy to Use. Must-have for piano tuning. You will Love those Handy tools. 3 Rubber mutes Great for muting The Left and Middle sections of the Piano. 3 Rubber mutes with handle for more easily muting Right section of the Piano. 5 Year Warranty!