What is the function of a fuse puller?

The function of a fuse puller is to safely and efficiently remove cartridge fuses, which are common components found in electrical systems. These tools are specifically designed to grasp and pull out fuses without the risk of electrical shock or damage to the fuse itself. When dealing with electrical components, it is critical to ensure safety; the fuse puller serves this purpose by allowing users to handle fuses that may be hot or otherwise difficult to remove by hand. The design of a fuse puller often includes an insulated handle, providing further protection and making the process safer.

In the context of the other choices, fastening wood to metal typically involves different tools such as screws or nails, cutting off water supply refers to pipe wrenches or valves, and flaring tubing ends is done using a flaring tool. None of these tasks relate to the specialized function of removing fuses, thereby affirming that the primary duty of a fuse puller is indeed to facilitate the safe removal of cartridge fuses from their sockets.