It can be used to hook two objects together.
For it to be used, two hooks must be placed directly, or in the middle, of the two objects you wish to connect. Most objects, including mice, can be connected. The hook will last about 10 seconds before disappearing. The skill serves no other use than to hold two things together for a short period of time.
This is rarely used by some troll shamans to "bully" other mice, by anchoring they to an anvil and prooced to cannonball him / Use arrows to point to him / Use the ability to make mice smaller.