1,The column is often used to separate the space on the object surface, or to fix the parts together and play an additional structural support role. 2,With standard M4 x 0.7mm female thread, the connection is precise and tight and seamless. 3,Made of aluminum alloy material, has high strength and strong ductility, not easy to wear after long‑term use. 4,Can be used to increase the structural rigidity between parallel plates (fasteners at the corners) or spaces with small gaps. 5,The kit contains 10 aluminum alloy columns, which are easy to use and replace, and are often used for CNC workpieces. 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.