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Title: Autoblock  
Author: World Heritage Encyclopedia
Language: English
Subject: List of friction hitch knots, Climbing techniques, Knots, Surgeon's loop, Blood knot
Publisher: World Heritage Encyclopedia


Prusik loop on the left and an Autoblock on the right.

Using an Autoblock is a climbing and caving technique used in rappelling and ascending.

An autoblock is a rope device that slides freely over the rope during a controlled descent, but jams in the descender in the event of a sudden drop or loss of control, stopping the descent. This prevents uncontrolled falls in the event of an accident in which the abseiler loses control of the rope.[1]

It is often made using a friction hitch around the rope that is being descended, and may be combined with other climbing equipment for further safety.[2]

See also


  1. ^
  2. ^

External links

  • "The Klemheist", Animated Knots by Grog. Accessed: May 5, 2013.
  • Backing up an Abseli

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