1、WIDE APPLICATION: Suitable for your DIY router, milling machine and lathe. Widely used in automatic machinery, as well as automatic equipment and accuracy measuring equipment. 2、EXCELLENT PERFORMANCE: Strong tensile strength, hardness better than common materials on the market, anti corrosion, acid proof, rust proof. 3、HIGH CARBON STEEL MATERIAL: The linear guide rail is made of high carbon steel, and the linear bearing is made of steel, which is more durable and has low noise. Low friction coefficient and premium track accuracy. 4、PACKAGE INCLUDES: There are 2 shaft guide, 4 slide blocks, 4 shaft supports, 1 screw rod, 1 nut, 2 bearing pillows, and 2 elastic coupling in the package. 5、IDEAL REPLACEMENT: Wonderful replacement for the old or broken one, fine workmanship, attention to details, helps improve the performance of the machine. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia