Trombone (small bore/medium bore) 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. ■Applicable: Trombone (small bore/medium bore) mouthpieces ※ Generally, tenor trombones (without an F attachment) are small bore or medium bore. ※ Cannot be used for medium bore mouthpieces with Euro shanks. ※ Cannot be used for mouthpieces other than the applicable ones because the shanks are different. Thank you for viewing. #Maintenance #Repair