1、MAIN FUNCTION: This pole clamp is suitable for GPS and RTK measuring instruments, providing stable clamping and support for convenient on site operation. 2、APPLICABLE RANGE: This adjustable holder is suitable for RTK measurements that require a 1 pole and 1 data collector, suitable for pole with a diameter of 38mm‑20mm. 3、ALUMINUM ALLOY: The data collector clamp is made of excellent aluminum alloy with anodized finish, ensuring good wear resistance and corrosion resistance. 4、WITH COMPASS: This adjustable pole clamp is equipped with a small compass to help quickly lock the orientation angle, so you no longer lose your direction. 5、EASY OPERATION: The GPS pole clamp is compact and lightweight, with flexible and convenient knob adjustment, making it easy for indoor and outdoor use.