The Grigri's primary advantage lies in its ability to catch a falling climber more effectively than the ATC. It reduces the risk of belayer error, making it a reliable choice for climbers of varying experience levels.

noun. gri·​gri. less common spelling of gris-gris. : a talisman, amulet, voodoo charm, spell, or incantation believed capable of warding off evil and bringing good luck to oneself or of bringing misfortune to another.

Mechanism of operation The Grigri works by pinching the rope when it is moving quickly (like in a fall), making it an assisted braking belay device.

With a GRIGRI, it is not possible to rappel on the two strands coming out of the anchor. So one must rappel on a single strand, blocked at the rappel ring by a knot attached to a locking carabiner. Rappel only on the strand opposite the knot block; the other strand is used only for retrieving the rope.