Underbody Steel Mounting Brackets,18 x 18 Inch Truck Tool Box Mounting Kit, with Screws Spacers and Sleeves - 2 PCS

Everything fit and was easy to install. The bolts and nuts were better quality than I expected.

The brackets needed extra support for proper installation.

OK

I made my own mounts for a smaller box, and needed something for a big (36-38”) box. Its a single rear wheel, so space is kinda limited, and these are the smallest ones i found. These are pretty heavy duty, made from heavy gauge steel. These come with all necessary hardware and even an open end wrench, although i don’t use these disposable tools. The brackets have a good amount of holes on each axis for many mounting options. Unfortunately, these still a tiny bit too long, and may have to be shortened. Also, my truck frame is a C channel, not a U channel, so I can’t use conventional mounts to attach it to the frame, and will most likely have to drill the frame, which i was really trying to avoid. But besides all those issues, these are great underbody box mounts

The Colinktool Underbody Steel Mounting Brackets are a fantastic choice for securing a truck toolbox. The 18 x 18-inch size is perfect, and the included screws, spacers, and sleeves make installation easy and hassle-free. These brackets are super sturdy and keep the toolbox stable even on rough terrain. The steel construction feels durable and built to last. If you need a dependable mounting kit, these brackets get the job done without a fuss.

These are good brackets. They look and feel well-made. Welds are good. Good support brackets attached. Pre drilled holes make this easy peezy for mounting. The black finish looks uniform and gives these a nice look.

Brackets are ok but the installation hardware is a disaster waiting to happen. Do NOT use the Nuts and Bolts that come with it.

My set lasted 9 months. Within that time one of the support brackets broke and I had i welded. Otherwise not bad for the price, was mounted on the frame of my semi to hold a couple 6' drop tarps. Buying again, gonna try to reinforce more this time

The paint finish on them is great, will probably never rust. They are solid 100% steel. The welding on them is really well done.

Works great for my truck. I might do the other side as well soon.

I'm using these brackets to replace a damaged set on my truck. The steel is not as thick as my old one but should be able to do the job. I'm using this to mount a generator which weighs around 300 pounds. The brackets hold up with no issues so far. The powder coating is OK, but I recommend adding some undercoating on it for those living in the north where snow and salt dominate the winter streets. This set comes with hardware as well which is appreciated so I don't have to go digging for additional hardware to mount my generator.

Current price point at the time/date of this review: $116.99 with a 8% discount being provided by the seller. Pricing is generally fair and comes in a more workable size compared to a similar and nearly identical unit to this with the only difference being in the dimensional length. As stated, I own a near identical unit to this one but sized differently - otherwise they are essentially the same. Works decent and seems to hold fine. I do worry about it knocking off with a sizeable hit or with the formation of rust/corrosion which can weaken points seeing as it’s constantly exposed to the elements given the application. Offers adjustable pre-drilled holes to work with. Not bad. ADDITIONAL NOTES Fairly sturdy and generally well joined together with a reasonable thickness and dimension, although I would’ve expected it to come in a slightly thicker and heavier duty industrial build given the application and with continued exposure to the elements. While it’ll hold fine and generally lives up to the task I think having an added layer of thicker reinforcements would be optimal in helping you feel more assured it can withstand all the exposure and constant use. heavier duty would’ve been butter but generally speaking it should work as the brackets are reinforced with a nice a decent angle support to help keep it all in place. Not bad overall but I would’ve expected a little more and for a little less. Overall I would peg it at a medium/heavy duty design/build. Comes with pre-drilled holes for flexible mounting points.

Amazing paint finish, these will never rust. The included hardware set is also top quality. I didn't use them though I just welded it directly. Very sturdy especially for the price, it's 100% steel.