The standard adjustable upright tent pole comes with a metal locking system, An 8mm-diameter x 75mm long plain spike in the top section and a plastic cap on the bottom section. These tent poles are mainly used in the vertical position or on a slight angle, Adjustable tent poles can also be produced with the following: - No spike but a plastic cap top and bottom, or a spike top and bottom the spike can plain or threaded, also the base of the pole can have a plate fitted with a hole in it for fixing it down with a tent peg, a plate can also be fitted to the top of the pole.