Two wraps are recommended for best use. A wrap is defined as crossing the top of the device. Larger loads (up to 1,000 lbs) can be rigged with three wraps. With three wraps on the device it will be harder to pull rope back while unloaded, and this is recommended only for the occasional large loads or for controlling a rigging line placed at the butt of the load.
The Aerial Friction Brake is based on a rope and rescue tool created by Carroll C. Bassett called the BMS Belay Spool. The benefits of this improved, arborist-specific design include:
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