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The Shunt blocker from Petzl is positioned under the descender and is used to self-secure a rappel descent. It can be used with one or two strings. Replaces the self-locking knots like the Prusik.
Features:
Material: aluminum body.
Installs easily on the rope.
The locking pieces are smooth and do not damage the rope.
Just release the Shunt to brake. If you accompany him, descend.
For a single string (10-11mm) or two strings (8-11mm).
Weight according to manufacturer: 188 g.
Certifications: CE and UIAA.
The Shunt is not Personal Protective Equipment (PPE). It should never be used as a fall arrest device. Not approved for work at height.