The 3M DBI-SALA® Rollgliss low speed auto retracting vertical descender is trusted by industrial workers everywhere for quick, safe rescue when things go south. An essential piece of safety gear for any crew's tool kit, this super-tough descender is built with corrosion-resistant materials and steel cable for reliable safety when lives are on the line. Powerful automatic retraction enables emergency evacuations for multiple workers and the pre-rigged construction makes it easy to use. The Rollgliss Descent Device will get personnel down safely from high places when quick escape is vital. The Rollgliss Descent Device is also extremely easy to operate. No power source or special skills or tools are required. Once the unit is secured to an anchorage, connect the snap hook to the D-ring on your safety harness and step off the structure. If using a sloped descent model, connect the emergency descent device with the guide cable sleeve or braking trolley and suspension bars to a user supplied and installed guide cable.