Brand New 360 Degree Mini Prism Applicable To The Installation of The 0.4mm Steel Wire Rope for leica Total Station Measuremen. Use the steel wire rope with a size of less than or eq. Ual to 0.4mm to vertically pass through the middle hole position from top to bottom for installation, and tie a knot at the top and bottom after the installation is completed for fixation, which is suitable for application in scenarios such as shaft measurement. High Quality And Brand New.