"Monster Hunter: Wilderness" is the latest work under the Monster Hunter IP. The hook projector is a piece of equipment in the game. This equipment can interact with some things on the map to achieve the results you want.
Hook projector environment interactive sharing
Examples of environments available for slingers and hook slingers
Rockfall
Rocks can be knocked down by impact using grapple projectors and the like.
Wedgeworm
Can be hung or moved after being hooked with the Hook Sling Projector.