The Quadra can change instantly from one mode to another while under load. A special braking mechanism increases the frictional force for lowering heavy loads. This device will arrest a 2 person fall factor by 1/3 when in life lining mode with no rope damage. It will also retain full function after a fall. Recommended for use with PMI® Access Pro rope.Key Features: Stainless steel • Patented secondary braking system • Included in the FallTek™ Rescue Solution