ITEM NAME:Metal Switch Column Clamp Opener Open lubricat Switches for Mechanical KeybS Ew Features: Product name: Shaft clamp Process: CNC plating Main function: After pressing, the clamp can be lifted from the axis to run the shaft Pen length: 8.2cm Total length: 12cm Package include:1pc.Main function: After pressing, the clamp can be lifted from the axis to run the shaft. Total length: 12cm.