Wrench replacements were replacements of the OmniWrench that Ratchet could use, available after he collected the right amount of skill points in the game. The only exception was in Ratchet & Clank: Up Your Arsenal where the player had to enter a code in the pause menu to acquire the Double-Bladed Laser Sword.
Double-Bladed Laser Sword
The Ninja Sword was a weapon that replaced Ratchet's wrench in Ratchet: Deadlocked when the player activated the Ninja Ratchet cheat in the Cheats menu. Note: If the Fission Lance wrench was equipped or any other wrench that was available after the Fission Lance, like the Obsidian Blade, the sword would be on fire. Also the Ninja Sword was much more powerful than the wrench.
A Crack in Time replacements
These replacements for the wrench could all be obtained after collecting 700 skill points.