Yes, it's a grinder brush - just a prettier grinder brush. 

Purpose:

This brush is essential for cleaning out your grinder, including the spouts, the dosing chamber, and the coffee bean hopper. It should be part of the tools that you use to clean your espresso grinder.

Features:

With use, essential oils and coffee particles build up in your espresso grinder. If you don't brush them out regularly, they will eventually degrade into acrid deposits within your grinder that will impart "off" characteristics to your freshly ground beans.

This brush has a 17cm long handle that makes it easy to use - easy to reach into the inner chambers of your espresso grinder.