French Horn Mouthpiece Shank End Correction Tool [Mouthpiece Shank End Correction Tool] This is a dedicated tool for correcting the shank end of a mouthpiece that has been deformed due to dropping or other impacts. The cylindrical brass material has a hole shaped like the mouthpiece receiver of a musical instrument. By inserting the shank end into this hole, you can correct the deformation from the outside. Also, by inserting the shaft of the shank tool from the opposite side, you can correct the deformation of the shank from the inside as well. *Cannot be used with mouthpieces other than the target mouthpiece due to differences in shank size. - Target: French Horn Mouthpiece - Materials: Brass, Steel Thank you for viewing. #Maintenance Supplies