This Vevor aluminum extrusion linear rail set includes 10 anodized 2020 profile rails designed for durable, precise frame building. Made from 6063-T5 aluminum alloy, the rails resist corrosion, oxidation, and scratches for long-term use. Precision-cut, burr-free slots and factory-tested straightness support stable performance in 3D printer, CNC, workbench, and display rack applications. The T-slot design works with standard M5 T-slot nuts and allows straightforward assembly without welding. Included hardware helps streamline installation for DIY and professional builds.