The Vevor 2020 T-slot aluminum extrusion linear rail set is designed for DIY builds, 3D printers, CNC machines, laser engraving setups, and other custom projects. Made from 6063-T5 aluminum alloy with an anodized surface, these rails offer corrosion resistance and durable everyday performance. The precision-cut construction helps provide smooth surfaces and reliable operation. Its T-slot design supports multiple compatible nut sizes for flexible assembly. This 4-piece set includes rails plus mounting hardware and connectors for convenient setup.