These poles have no adjustment on them they come in 1Pce, 2Pce, 3Pce, or 4Pce.

The spike in these poles can be 6.3mm diameter or 8mm diameter and be plain or threaded, the base may have a cap or a plate on it. The diameter of the tube used for these poles is: -

16mm 19mm 22.2mm 25.4mm, and 28.5mm.
Heights of poles vary from 180cm up to 300cm.