30 Set Black 2020 Series Aluminum Extrusion Profile Connector, Includes 1pc Wrench, 30pcs 2028 Corner Bracket, 60pcs T-Slot Sliding Nuts and M5 Hex Screw Bolt for 20S Aluminum Rail Accessories

I’m really impressed with the quality of this PETOX Aluminum Extrusion Connector Set. Usually, when you buy these bulk hardware kits, you expect a few bunged-up threads or missing pieces, but everything in this 30-set pack was spot on. The black finish on the corner brackets is nice and consistent, which makes my 2020 frame build look much more high-end than the raw silver ones. The included T-nuts slide smoothly into the rails without jamming, and having the right size wrench included in the box meant I could get straight to work. For the price, it’s a massive time-saver for anyone doing DIY 3D printer or sim rig projects.

I use 4040 aluminum to build a roof rack on my van. This corner bracket is very rigid. I like it.

The brackets and 8mm bolts were fine, but the t nuts were too wide to fit my 4040. luckily i had a bag of them from a different vendor. Seller contacted me after my first review and offered a full refund, and said they would address the issue with their supplier

I love this system so much more than unistrut!! BUT, I hate that these brackets have the little nub that only allows them to be installed one way. Overall, GREAT system.

These worked perfectly for all the inside corners on my 10-inch equipment rack using 2020 extrusion. Combined with an outside gusset, the joints are very strong and don't interfere with equipment mounting. There is enough slop in the oval holes to allow alignment, then they hold tight. Glad to have this in my 2020 inventory.

Solid and sturdy worked for my custom drawer system

The 90s work great. But all the hardware started rusting within a month.

Muy buen producto, recomendable