DaierTek 12V Relay Box 6 Slots Fuse Relay Block 6 Slots ATC/ATO Fuse and Relay Block with Relay Universal Fuse and Relay Box Kit for Truck Marine Boat

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 30ampFuses. 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.

For the price it is grand, extra pins and fuses, relays seem substantial, plastic box wish bottom just a tad deeper but certainly OK... BUTAll relays and slots the same for 6 Bosch style relays not for 1 RTT7121 4 pin relay and 5 Bosch - not a real problem BUT leaves the "buy" and the directions/images inconsistent with reality. Also the box came configured inconsistent with the directions - again not a real problem to me.But one must know fundamentals, think , and adjust before wiring - do not blindly follow directions.NOT real problems, and am very satisfied, but I do have cautions. For the price it is grand and on that basis I give it 5 stars.

The description claims that the covers make this a water proof box but the covers have no gaskets. It would be fine in an engine bay but I would not put this on a boat or anything that goes off road. The material quality seems good for the price but since it isn't suitable for my project I have not attempted to use it.

My brother and I used two of these boxes to rewire a classic car. We liked the compact design and we bought an extra to fill one with relays and the other we filled all but two spots. We didn't need the fuses as we kept the OEM fuse block.We bought the bare assembly so we wired it ourselves. We have the proper tools to give great crimps on open terminals, we are very experienced in that task.The boxes are good and strong, plenty good enough to pass as OEM on a modern car IMO. What I don't like is that the relays are so tight together it is very difficult to get them out. We have to use a flat bladed screwdriver, often two at a time, to pry them out. The connection terminals provided have a high tension on the blades of the relays. It would be great to have some sort of tool to grip the relays from above so they can be pulled out more easily. Additionally the individual relay blocks that hold each relay snap in from the top of the box. As we've pulled out a relay the block sometimes comes loose, that's why we need to use two pry tools, one to hold the block down and one to pry on the relay.We placed the two boxes side by side, and the design for mounting to a panel accounts for this, the ears are staggered so they can be put side by side without having to change the height, a nice level installation. I would not say these are water proof, but they are quit tight. The bottom needs a tool to pry it off. Overall we are happy with these, just wish the connectors were not so tight.

Used to create a training aid with an engine on a stand. You do need to understand relay function and electrical circuits to get this working. Great for the price!

Bought two of these for my project vehicle im working on, it was the perfect fit and was easy to assemble for those with basice electrical knowledge. Had good quality fuses/relays along with the terminals proivided.

Muy buenos.