Sea Dog Fuse Block, 10 Circuit with ground. ATO/ATC Fuse Block with Negative Block are used to provide over-current protection to help protect wiring in electrical circuits. For use with Sea-Dog(R) ATO or ATC Style Fuses 445101-445130, 445190, 445156, and 445157 (sold separately). Maximum: 30A per circuit @ 12VDC. Constructed of injection molded ABS with tin plated copper contact and ground tabs. Installs with four #10 RH fasteners (not included).