The Box Breaker is an item in Going Commando, Size Matters, Ratchet & Clank (2016 game), and Rift Apart. It is an OmniWrench attachment which allows Ratchet to destroy all boxes and breakable objects in his vicinity by performing a hyper-strike.
The Box Breaker's functionality was included with the Bolt Grabber V2 in Up Your Arsenal. In Tools of Destruction and A Crack in Time, the Box Basher 2000 can be obtained, which has the same functionality.
In Going Commando the Box Breaker is obtained after returning to the Megacorp Outlet on Oozla with the Gravity Boots, by defeating the swamp monster II after ascending a previously inaccessible grav-ramp within the store.