The Vevor linear guide rail set is designed for automated machinery, CNC applications, and DIY motion projects requiring smooth, precise linear movement. It includes two 39.4-inch SFC20 guide rails, four SC20 slide blocks, and four rail supports for a complete installation setup. Built from high carbon steel and aluminum with a chrome-plated surface, it is made for durability and rust resistance. The integrated ball bearings help provide smooth, low-friction sliding with stable motion. This set is well suited for router sleds, 3D printers, laser engravers, lathes, and similar equipment.