What is "biners"

Usage examples of "biners".

The carabiners, being safety equipment, were among the only pieces of technology that the captain had allowed the Tiffnakis from the well-stocked backpacks the away team still carried from the first Scouting trip.

The cara biners, being safety equipment, were among the only pieces of technology that the captain had allowed the Tiffnakis from the well-stocked back packs the away team still carried from the first Scouting trip.