This Littelfuse holder is a bolt-down fuse holder for MEGA-style fuses. This holder is ideal for battery, alternator connections, and other heavy gauge cables requiring ultra-high current protection. It includes a protective cover and features interconnecting pins on side of the fuse block for secure multiple block configurations. It also includes M8 threaded studs and hex nuts with lock washers. We really enjoy the OEM style look along with the high-quality, OEM style build of this fuse holder. No flashy, chrome-plated, clear cover, just a top-notch fuse holder that uses one of the best style fuses in the industry, MEGA. All of our custom amplifier kits along with every car we work on at the shop use this fuse holder.