The Littelfuse ATO® Series Diagnostic Emergency Fuse Kit is designed to help restore the performance of your electrical system. This kit includes a roadside tester/puller that tests, removes and installs fuses, making it easy to diagnose and repair any electrical issues. The kit also includes a plug-in installation, making it easy to install and use. With this kit, you can quickly and easily diagnose and repair any electrical issues, ensuring your electrical system is running at its best. FleetPride is your First Click in Heavy Duty®.