Yarryuter Grinding Rod Repair Tool Repair Tool Instrument Accessories Trumpet Part Steel Connecting Piston for Various Types

[3 sizes]:A for pistons with screws; B for pistons with metric screws; C for tenors, euphoniums and with vertical keys. [Features]:Instrument maintenance tool solves the problem of inflexible rust caused by pistons left for long periods of time. [Wide range of applications]:The Trumpet Piston grinding auxiliary tool is available with 3 sizes of heads and can be used for basically any vertical key brass instrument. [Rod extension]:The Instrument parts repair tool has an extended connecting rod, so you don't have to worry about touching the body during the grinding process. [Easy disassembly]:The Grinding Rod Repair Tool avoids the inconvenience of disassembly after tightening.