BLCCLOY 20 Set 78x78mm 2020 Aluminum Extrusion T Slot Corner Bracket 20 Series Extruded Hardware 90 Degree Right Angle Connector with M5 Bolts Nuts for 20/20 80 20 2040 T V Slot Black Aluminum Profile

This corner bracket set is excellent quality. The aluminum extrusion brackets are sturdy and well‑machined, with clean edges and consistent sizing that make assembly smooth. The included T slot nuts and bolts fit perfectly, saving me the hassle of sourcing hardware separately. I used these for a DIY frame project, and the joints came out solid and square with no wobble. The finish looks professional, and the hardware tightened down securely without stripping. It’s clear these are designed with precision and durability in mind. For anyone working with 2020 series aluminum extrusion, this set is a reliable choice that delivers both strength and convenience. Highly recommend!

Well made no burrs. Fit perfectly and made a solid connection between two bars.

I bought these for the Ender 5 I own. It's still in pieces at the moment but these corner brackets work exactly as specified. They helped me make the entire printer more square than before my tinkering. The Y axis motion is smoother due to being more square. Absolutely a breeze to use. They sit inside the frame, so they are not unsightly like the original corner brackets. Remember to use thread lock on the grub screws.

These work well and are sturdy for interior joints. But they fit quite tightly. I was mounting a cross bar between two pieces of extrusion and trying to slide it to align it properly, but even when fully unscrewed, these brackets are very hard to move.

great quality

Works well will my 2020 aluminum. It is sturdy and reasonably priced

Perfect. Product is exactly as described.

I used these simple L brackets for a different application than they were designed for -- to create "platforms" or "ledges" on which I could support gutter guards against the back of the gutter. I know, kind of random. But they worked! And they're aluminum, so they won't corrode. Only product I found on Amazon that looked like it would work for this purpose.

Perfect at 20mm x 20mm, not like similar ones that stick out a few mm. That means the hole at the end of a 2020 extrusion lines up. I bought twice now.

J aimerais savoir si il y a des équerres plus grandes mais qui a 6 mm la même mesure mais plus long de chaque cote

The flaws are fixable. The tube that goes over the bolt to keep from crushing the hinge is plastic - should be metal. Fortunately I had an appropriately sized metal tube in my scrap bin and cut a length to fit. Then, there is too much of a gap between the inner and outer tabs that would cause the outer tabs to clamp down unevenly. Fix is to use a thin washer between the inner and outer tabs on one side so everything starts out snug and nothing flexes when tightening.

Good quality and fits well

Work as described