- Rock Krusher is a Gigantion Mini-Con from the Cybertron portion of the Unicron Trilogy continuity family.
The hardy Rock Krusher is a member of the Steel Reinforcement Team, the personal attendants of the Giant Planet leader Metroplex. He has a very high standard for the buildings he works on - if they can't survive an attack from HIM, they weren't good enough to begin with.
Unfortunately, it turns out this master builder is also very good at knocking things down. 
- Japanese name: Gritbit
- Gritbit (Mini-Con, 2005)
- A redeco of the Destruction Mini-Con Team member Drill Bit in colors matching those of Metroplex, Rock Krusher/Gritbit transforms into a drill-tank of undetermined model. A gear-wheel system on his vehicle-mode underside spins his drill when he is pushed along a smooth surface, or when he is connected to the gearing system on the Cyclonus/Buzzsaw mold.
- Gritbit was one of several promotional Mini-Cons exclusive to various stores for a limited time in Japan. Gritbit could only be obtained with the purchase of any Transformers product at Hello Mac stores during September of 2005.
- This mold was also used to make Monocle.
- The name "Rock Krusher" (yes, with a K) was first used for in Hasbros' C.O.P.S. toyline, as one of the evil Crooks.
- ↑ Official Transformers Collectors' Club site members' section, Micro-Sized Online! Mini-Con Profiles, 5/18/07