








🔩 Elevate your frame game with invisible strength!
This 20-piece set of L-shape interior corner brackets, crafted from electrophoresis zinc alloy, offers rust-proof, abrasion-resistant, and concealed support for 20x20mm aluminum extrusion profiles. Complete with screws and a wrench, it’s the go-to solution for professional-grade industrial frames, 3D printers, CNC machines, and robotics projects.





| Finish Type | Painted |
| Unit Count | 20.0 Count |
| Item Depth | 20 millimeters |
| Mounting Type | Shelf Mount |
| Manufacturer | Tongling Hardware |
| UPC | 796862233266 |
| Part Number | Tongling-JC-20S |
| Item Weight | 7 ounces |
| Product Dimensions | 1 x 1 x 0.37 inches |
| Item model number | 2020 series extrusion M5 |
| Size | 20pcs silver with screws |
| Style | 20Pcs Interior Bracket with Screw |
| Finish | Painted |
| Item Package Quantity | 20 |
| Included Components | 20 series aluminum extrusion l bracket., M5x6mm set screw., a M5 wrench. |
| Batteries Included? | No |
| Batteries Required? | No |
N**C
Just need to know their limitations.
The media could not be loaded. Honestly, these are pretty nice depending on what you're going to use them for. I'm going to use two to hold this small lightweight monitor up. But even with only one arm, they seem pretty rigid. Wouldn't leave it this way, and I'll be adding a second arm but these will definitely work. I like that you can lift the spring loaded handles and adjust their position independent of tightening the tensioning bolt. This made things so perfect for my application as it allowed me to mount the monitor closer to the machine enclosure without having to worry about handle clearance. Note, I did have to modify two of the alignment nubs (I had to remove them with a dremel) in order to allow me to mount them in the orientation I have them on my extrusion. Other than the few quirks I mentioned above, these are fairly nice, and since I'm wanting to move the monitor angle, the tensioning is plenty tight for my use.
L**U
Thanks Rafi
Bought this I guessed it worked for his hack job project
N**.
Great!!!
Buy from these guys and Gals, great service and products
P**V
Awesome corner brackets
These are great at the end of the day. Needed some work to fit properly though, there are some overmoulding spots that need to be ground down, and the relief in the corner is not deep enough to fit corner cubes, so you have to mill/file/grind them a little. Also every single hole needed to be tapped before anything would screw in, but they accomplish the goal after that.
A**O
Enables rotation but does not lock to form stable angle.
I experimented with lock washers and even added steel tubing to limit flexing of the internal fork. The leverage is just way too high with 300 mm extrusions.
D**N
Great find
Very lightweight, and appears to be strong enough to get the job done. I searched and searched for good panel mount bracket for 20mm extrusion or 80/20 10 series extrusions and found nothing that wasn’t crazy expensive. I’ll definitely be buying these again.
B**N
Good choice
These did great for what I was using them for. Thanks
P**P
Buy these (not those)
The button head screws are what you need for this tight location. I feel like the brackets themselves may have been made in the same factory, and they just don't have room for socket head screws. Tongling assembled parts that work together.
Trustpilot
1 week ago
1 month ago