This ATC fuse assortment comes with a variety of common fuses along with a fuse test/puller. The fuse tester/puller is a great tool to easily identify which fuse needs to be replaced and then allows you to remove that fuse without difficulty. ATC fuses are used to protect a car’s electrical system. This includes the vehicle's lights, engine, air conditioner, heat, wipers, and more. All of our fuses are color coded and have the amp rating stamped on the front to make them easy to identify. The transparent housing also lets you see when the fuse is blown, allowing you to quickly identify which fuse needs to be replaced.