Snap locks into a fixed length of 2 meter . One-piece design and two locking systems.Snap lock prevents slippage.Compression lock centers the inner pole.Made of carbon fibe. The top tip thread is 5/8-11 UNC .Comes with a 40-minute vial.External metric graduations.Locking lengths at 1.8 and 1.6 m.
It is also available for Leica-type connector,and its model is DP-3L.