Thumb hole bushing becomes necessary when the thumb hole becomes worn as shown in the first photograph. Difficulty playing high notes can often be attributed to this wear as the worn recess acts as a guide to the thumb nail. The solution is to return the hole to it’s original shape. This is done by counter boring (recessing) the surrounding wood and inserting a plastic ring.
The second photo shows the same instrument with the restored hole. The plastic used is a hard plastic which should last for years. If however this gets worn it is an easy job to replace with a new ring.
Descant/treble/tenor : £30
Bass : £39