MARK Save A Life ‘Self Rescue System’ is a relatively safe, simple, low cost self-escape Controlled Descent Device that functions as an alternative means of emergency escape when needed. SAL’s Rescue System appeal to the following group of customers: 1. High rise industrial facilities such as in tower cranes (LIEBHERR cranes, WOLFF-cranes), overhead crane, cable car; 2. Fire & Rescue Department, Military; 3. Developers, Building owners or Tenant Groups in office buildings, hotels; 4. Small businesses in buildings with windows or glass panels that can be modified for easy removal; 5. Individual home ownership for families in high rise apartment — stores in a closet — in many cases requires no modifications to structure.