The Box Breaker is an item in Going Commando, Size Matters, and Ratchet & Clank (2016 game). It is an OmniWrench attachment which allows Ratchet to destroy all boxes and breakable objects in his vicinity by performing a hyper-strike.
In Going Commando the Box Breaker was 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. In Size Matters it became available for purchase from a Gadgetron vendor for 20,000 bolts during "Escape the medical facility" on the Medical Outpost Omega. In the 2016 re-imagining it was obtained on planet Gaspar after collecting all telepathopus brains and turning them in to the Blarg Scientist.
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.