What tool is specifically used to swage the collar onto the locking grooves of a lockbolt?

The lockbolt installation tool is specifically designed for the purpose of swaging a collar onto the locking grooves of a lockbolt. This tool applies the necessary force to deform the collar around the lockbolt, ensuring a secure connection that can withstand the operational stresses it may encounter.

Other tools mentioned, such as a crescent wrench, are versatile but not specialized for this specific task. Similarly, a screwdriver is used for driving screws and does not have the capacity or design to perform swaging. A torque wrench, while important for applying specific torque to fasteners, does not engage with the locking mechanism of a lockbolt in the same way that a lockbolt installation tool does. Therefore, the unique design and function of the lockbolt installation tool make it the correct choice for this application.