What is the primary purpose of a dead-man control on powered rescue tools?

The primary purpose of a dead-man control on powered rescue tools is to prevent accidental activation. This safety feature is designed to require constant pressure or activation from the operator in order for the tool to function. If the operator releases their grip or their hand slips off the control, the tool immediately stops operating. This mechanism is crucial in preventing unintended injury to the operator or bystanders and ensures that the tool is only active when needed, promoting safe practices during rescue operations. By requiring continuous engagement from the user, the dead-man control significantly enhances safety in high-pressure rescue scenarios.