MakerBeam 300x10x10mm Beam Black anodised (Pack of 4)

Pretty good and sturdy. Problem is, it is too expensive and no other sources of accessories other than makerbeam themselves. I guess only the M3 Nut is available elsewhere. So if you run out of screws or of attachments, only makerbeam can help... for a price.

I received these today, along with some corner brackets, and within an hour of opening the package the frame I was building was finished. Would scraps of wood and some brackets from the hardware store have been cheaper? Yes, but these are much more precise, which I needed for my current project. Overall, a solid product, if slightly pricey. Still, I would recommend these to anyone.

Works as expected.

Works great if you need a mini t bar slot. Be sure you know that this is smaller than the 1 extrusions we commonly see.

Its very easy to build up my own projects with these beams. I love it!

Good for lightweight projects Dont forget to order correct nuts

I like working with these products on my multicopters but wow are they expensive.

I bought these extrusions for a diy project, absolutely love them. But, the finish has been ruined due to aluminum chips and shavings left in the packing, and they bag them up so they rub together as well. I expected more from how expensive these are. Good otherwise, if you dont mind a rough finish.

The product is good quality. Honestly I did not look closely at the measurements before I purchased them. These are not a size I can use, they are much too small. However, they are exactly as described.

I bought these to build a structure for a robotics project and they worked out great. I plan on using them in future projects. The beams are solidly made and had no warping or bends. They are also center drilled all the way through and tapped at both ends to receive M3 size screws. If you have used aluminum extrusions before but need to build a smaller structure, then I would highly recommend this product.