Kit tests glass tube and blade-type fuses and fuse boxes using ATO, Mini and Maxi fuses. Accesses power source to check for voltage, opens, shorts and amperage draw from selected circuits, etc. Nylon connectors easily adapt to fuse box. Plated contacts. 12" leads. Kit includes: - ATO Fuse Block Adapter - Mini Fuse Block Adapter - Maxi Fuse Block Adapter - Relay/Maxi Fuse Removal Tool. Eliminates backprobing and other makeshift methods that can damage wiring or connector. Easy, professional way to test electrical circuits at fuse block.