20pcs/lot 1" x 1" Aluminum Extrusion Profiles 1010 Series L-Shape Interior Corner Connector Joint Bracket with Screws for 10x10 Aluminum Profile 1 Inch x 1 Inch Extrusion Profiles Rail

Mine were just as good as any others. They required no work to fit into my existing 1010 extrusions. I will get more of these.

Honestly with all the reviews of fitment issues I was weary to buy these but at such a cost savings over McMaster or 80/20 it would still have been worth the extra effort. I used every one of them in my simulator and not a single one had an issue. They went in without problem, the threads and set screws were all in good condition. Definitely saved me plenty over the name brand ones.

Honestly,I couldn't be any less unsatisfied with these. I thought "hey maybe it's not as bad as the reviews make it seem"....well I was WRONG. It comes with a file that's even more a peice of junk to fix any "imperfections",I ended up using a belt sander and I had to sand down 80 of these things. And then when you get to installing,even the set screws suck! Some threads were beat but ALL of the hex heads of the screws are too loose for a 2.5mm hex and too big for a 2mm head. Trying a few with the 2.5mm and just a little torque and the head strips. So I ended up having to use a t10 starbit because the taper of the bit allowed it to snug up on the screw. So now I'm using these to temporarily build and hold together and after I write this I'm going to buy something stronger. So yeah it sucks I bought 4 packs of 20,what a waste of money

Product arrived with a small file, but not needed as all units were clean and fit well into my 10 series extruded aluminum. Pleasantly surprised as I’ve had to return other connectors as being too large or small for 10 series even tho they too advertised as fitting.

These are just ok. Considering they are the only generic in-slot connectors on Amazon I'll deal. 90% of these required filing to actually fit in the slots. Several had screw threads that were no good. They are quite a bit cheaper so hopefully they hold up and were worth my time.

It sure if they are as strong as the larger corner ones, but they work and we had to use them in some areas of our sprinter conversion.

These work AFTER you spend hours filing down the imperfections with the included mini file. It's just not worth the time for the savings. Spend a few more $ and save your yourself headache and time.

Claims to fit the slot on a 10 series extrusion, but it's larger than the whole extrusion. Does not fit Makerbeam.