What is this tool used for?

My hobby is playing musical instruments.

The shock absorbers of this car have been replaced with new ones.

Fish use their respiratory organs to take in oxygen underwater.

He truly embodies the saying, 'A gentleman is no specialist.'

The Bartholin's gland is a part of the female reproductive system and primarily secretes lubricating fluid.

The bulbourethral gland is one of the important glands in the male reproductive system.

The bulbourethral gland plays an important role in the male reproductive system.

The Skene's gland is a part of the female reproductive system, and its function is not yet fully understood.

The pineal gland is a very small gland that exists in the brain.