What is the main function of a power impact driver?

The primary function of a power impact driver is to drive screws and fasteners into tough materials. This tool is specifically designed to deliver high torque output, which makes it effective for tasks that require the fastener to penetrate dense materials, such as hardwoods, metal, or concrete. The impact mechanism allows the driver to provide a rotational force combined with rapid bursts of impact, effectively driving the screw deeper without stripping it or exerting excessive stress on the user's wrist.

While other tools may perform similar tasks, such as drilling or sanding, they do not provide the same level of efficiency and power in driving fasteners. For instance, a drill is primarily intended for creating holes, and while it can drive screws, it may lack the necessary torque for tougher applications. Similarly, sanders serve to smooth surfaces but are not designed for driving screws at all. Thus, the impact driver is uniquely suited to the specific task of driving screws and fasteners into challenging materials.