Usage
The Munter Mule is a releasable contingency rigging system that combines a Munter Hitch with an additional locking component, the "Mule," to secure the hitch in place. It requires no additional hardware besides a carabiner. It is commonly used for releasable rappels and can be released even under tension. This knot is particularly useful in scenarios where temporarily locking off a rope is necessary, such as during rescue operations or belaying. The Mule knot secures the Munter Hitch, preventing the rope from slipping while allowing for easy release when needed. It also enables the climber to go hands-free, earning it the nickname "the rescuer's extra hand." The Munter Mule Overhand is often referred to as the "MMO" for short. Note that the animation above starts with a Munter Hitch already tied.
Warning
Verify tying technique with a skilled instructor where knot failure could cause property damage, injury, or death.
Also known as
Structure
The Munter Mule Overhand is a compound knot made up of three distinct parts: a Munter Hitch, a slip knot called the Mule and a finishing Overhand Knot for security.
Strength/Reliability
The Munter Mule Overhand is safe and secure. There are variations of the Munter Mule that conclude using a different safety knot than shown here. Some use an Overhand Knot as in the animation while others use a Half Hitch or other mechanism for backing up the Mule slip knot so that it isn't accidentally pulled or work itself loose.
Note
The Mule and Overhand are tied using the brake strand. Additionally, the Mule should be pushed up as close as possible to the Munter Hitch before tying the Overhand Knot backup.
