The Telescopic Equinox aftermarket stems have been designed by long time friend and Minelab owner Scott Ellis. He has put a lot of thought and experience into the design. There is an anti rotation feature built into the length of the stem externally which increases their strength and also stops sideways movement so no twisting or wobble. This is for the two piece carbon fiber metal detector shaft. This model will accommodate Minelab Equinox series detectors (Equinox 800 and Equinox 600 metal detectors) and will work with the Minelab Vanquish metal detectors using the proper adapter.