Review on Carviya 4-8 Gauge AWG In-Line Waterproof Fuse Holder With Six 30A 30Amp AGU Type Fuses For Car Audio/Alarm/Amplifier/Compressors (30Amp by Kevin Kue

Works but not well. If you use it for 8 gauge it's probably great, but not great for 4 gauge. The adjusting screws used are too long and of very poor quality. In order for them to crush the wire enough for the set screw to loosen the caps, you would have to tighten them firmly, but the heads rounded off almost immediately. I managed to get caps of about 75 percent and I called it good. If you have extra set screws that are shorter or you are using them for 8 gauge wire then go for that, otherwise I would recommend something else. It comes with two 30 amp fuses and apart from the screws the build quality seems decent. Edit: I just checked the included set screws and tried to find the right one. It appears to be a 1/4-24 set screw and not what we have in our many set screw baskets. As far as I know, this is not a very common size. So if you can't buy 1/4" or so 1/4-24 set screws before ordering this part, I wouldn't bother.