This is a very unique tool, perhaps even a collectible.

Has spring loaded pins (that you squeeze with two fingers to expand) on one jaw. 

Easy to use one-handed.

Squeezing the grips expands the jaws about 1/4 inch.

Use the knurled knob to adjust to the instrument jaws for the correct start position.

Quickly remove a stuck mouthpiece.

Since it is has a universal adjustment, it is perfect for a music store, music teacher, band director or someone that has multiple instruments..

Also, it would be superb for someone who wants the best and fastest method to remove a stuck mouthpiece.

It appears that this device is no longer in production and is RARE.

The only identification on the device is the patent number, as you can see in the pictures.

The actual patent is also included in the photos.

Inventor: Archie Lyon