Fuse Holder and Fuses are sold separately. A necessity for protecting your power inverter and other electronics; ANL fuses prevent voltage spikes (over-current) from harming your device. Our quality fuses are a standard size and work with most common fuse holders including our ANL Fuse holder assembly. They have been thoroughly tested for quality and resilience. If you need help determining which size fuse you need, please see our "Inverter Battery Cable Gauge Chart": Located here Fuse Holder and Fuses are sold separately.