DAIERTEK 12V Fuse and Relay Box, 6 Slots, ATC/ATO, Universal, Waterproof, for Automotive, Car, Truck, Marine, Boat

Solid. Don’t take it pre-wired if you have a project in mind and know how tu plug relays. I used it for my ls engine swap. Works perfectly and small enough for a discret fit.

First off is the unit that I got does not match the picture of the description. As others noted it actually has six Bosch five pin relays with no 4 pin. They relay mounting surface on the unit that I received had a closed face (individual snap in relay mounts in a plastic frame) and was a nicer part than pictured. What I really liked is that the contacts are all 0.36 mm thick material, instead of the more typical 0.28mm contacts you buy in kits. The thicker contacts do increase the face needed to insert the relays, but is helpful to insure a good connection on high current, large gauge wires. I would recommend using the supplied contacts just on the power switching connections and substitute regular terminals on the connections to the relay coils. Using all thick contacts makes swapping relays more difficult than it needs to be. It also lets you keep a few spare "good" contacts if you make a mistake. I made one small improvement to the design by adding a wire guide that fits helps to align wires to the box. The helps keep the wires from twisting the contacts in the box. This seemed to really help when using stiff 12 AWG wire. The unit works either way. Overall, I was very happy with the product. I attached a screenshot of the wire guide I 3D printed.

You won’t be impressed by the quality, as the plastic isn’t very thick and it certainly isn’t water proof. However, for the price I think it’s great. I mounted both the box and a 250 amp bus bar (also from Amazon) to a piece of stainless sheet metal and made a functional power distribution box. It will keep the mud and other debris out and is far better than mounting exposed relays and inline fuses everywhere. I purchased the wire yourself version and as others have said there are just enough connectors for all slots, so take your time. The orientation of the connectors is important as well. They must engage the plastic prong in the slot otherwise, they will push out the bottom when you put in a fuse or relay. If inserted properly the connectors remain secure. Lastly the fuses that come with the boxes are suspect. I quickly blew two of the included 30 amp fuses after getting it all set up. Wasted about an hour rechecking all the wiring (thinking I messed up), before going to autozone and purchasing some more 30amp Fuses. With the new fuses everything worked as advertised. The supplied 30 amp fuses seemed to blow around 25 amps. No problems with the relays so far. Bottom line: It enables a tidy wiring solution, provides some protection and is inexpensive. I would buy another.

Finally I got to work on the box and to my surprise the terminals are missing. The relay terminals are no Biggy, but I have no fuse terminals. Now I have to run around to get some, hoping they will fit. I did not get for what I paid for, the biggest problem being the time. I need to finish the box wiring.

Received this product, and spent a few days doing wiring, crimping connectors, pinning the relay box and fuse panel. Went to install relays and they push all the pins out the back. Had to flip the box over and install every single terminal individually into the pins. The pins provided with the kit are ok quality, but you dont get any extras. Been a mechanic for 20 years, and never had this much trouble assembling a relay/fuse panel. I guess you get what you pay for. After a while i was able to get all the relays installed with all the terminals properly seated, but if I ever have to remove a relay to test or replace, ill have to remove the entire panel, flip it over, remove the rear cover and put the pins in the relays manually one by one. This relay panel does a nice job of cleaning up wires for multiple accessories but there exist much better quality relay panels that wont require you to disassemble the relay box every time you want to replace a blown fuse or a faulty relay