Rugged aluminum housing and stainless steel working components can withstand rough use, yet is extremely lightweight. Unique webbing enables the compact size that is easy to use. Incorporates a smooth case with rounded corners for added comfort and ease-of-use. An SRL's lifeline will extend as the user moves away, and retract automatically enabling the user to move about within a recommended working area at normal speeds. Should a fall occur, a speed sensing brake system will activate stopping the fall and reducing the forces imposed on the user to safe levels. Tough and impact resistant stackable thermoplastic housing.