Review on European Standard Anodized Aluminum Extrusion Power Transmission Products with Enhanced SEO by Eugene Cox

Firstly, the product and the material of the product itself seem good. Easy to cut etc. Not anodized which is not very good as it gets quite brittle and scratched easily. Now for the bad. If you plan on threading, be prepared that a regular M5x0.8 will NOT fit. The inner channel is larger than the standard size 2020 extrusion. Since all 2020 related hardware is usually standardized to M5x0.8, it's very frustrating to find that all the threaded ends I've added to my cuts will NOT hold an M5 screw. I suspect they used a slightly larger diameter to save the many, many feet of extrusion they do.