3504550 – Ultra-Lok RSQ (SRL) Self Retracting Lifeline – 50 ft. (15.2m) – Galvanized cable lifeline w/ steel snap hook – Rescue (RSQ) Dual-mode – Single leg – Anchorage loop for mounting

$1,608.80 + Free Shipping

Attention: Product has a 5 day leadtime and is expected to ship in 5 business days.

  • 50 ft. (15.2m) – 3/16″ (5mm) galvanized steel wire rope
  • Swiveling anchorage point – for mounting SRL
  • Galvanized steel snap hook connects to harness
  • Internal energy absorber
  • Equipped with 3M™ Connected Safety ID (CSID)
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50 ft. (15.2m) of 3/16″ (5mm) galvanized steel wire rope with swivel snap hook and RSQ™ dual-mode.

    • Single leg – 50 ft. (15.2m) of 3/16″ (5mm) galvanized steel wire rope
    • RSQ™ dual-mode: Rescue or Fall arrest mode
    • Galvanized steel snap hook on end of lifeline for attachment to support structure.
    • Swiveling anchorage loop for SRL mounting.
    • Reserve lifeline system.
    • Energy absorber saves lives by absorbing deadly falling forces.
    • Long lasting – Semi-sealed design protects moving parts from grime, dirt & sludge.

Self-retracting lifelines (SRL's)

An SRL is an alternative to traditional shock absorbing lanyards and work a lot like a seat-beat - pull out slowly and extend the line; but don;t you try to run with it.

These devices are specifically designed for professionals who work way up high - stopping falls within inches to allow great mobility.

Real quick - whats an SRL?
  • Retractable lifelines designed to stop a fall within inches.
  • Constantly under tension, but extends or retracts as the user moves up and down.
  • Offers greater protection then a shock absorbing lanyard.

TL;DR - Self-retracting lifelines connect a harness to an anchor and offers great fall protection than a simple lanyard.


RSQ Self-retracting Lifelines

Dual-mode RSQ models allow crews to choose between fall arrest, self-rescue or whatever is most appropriate for the application.

3m dbi sala RSQ SRL with fall arrest mode

Fall Arrest Mode - A speed sensing break stops the fall, reducing the falling forces to safe levels.

3m dbi sala RSQ SRL with automatic descent mode

Descent Mode - Brakes to stop the fall, then instantly a centrifugal brake activates and safety lowers the user to solid ground.


Ultra Lock SRL's are rugged, lightweight & high quality devices you can trust with your life.This long-lasting SRL is a beautiful culmination of stainless steel parts, anti-ratcheting brake system and a semi-sealed design.
All 3M Fall Protection SRL's are backed by decades of experience, research & proven results.
  • Rugged design, semi-sealed for longevity
  • Lightweight thermoplastic housing can take a beating whilst remaining lightweight
  • Stainless steel moving parts products by semi-sealed design
  • Anti-ratcheting twin disk braking system is constantly moving, limiting lock-ups
  • Swiveling anchorage point allows for more flexibility and freedom of movement
  • Snap hook is user friendly, and features an easy-to-read impact indicator for quick inspections
  • Reserve lifeline system
  • Ergonomic handle equipped with 3M™ Connected Safety ID (CSID).
  • Includes both INTERNAL & EXTERNAL shock absorbers to reduce falling forces in event of fall. (LE models)

Additional information

Weight19.25 lbs
Dimensions10.5 × 6.9 × 3.10 in
Connection Material

Galvanized steel

Lifeline Material

Galvanized Cable

Hook type to Harness

Snap Hook

Hook type to structure

Anchorage loop

Overall Length

50 ft. (15.2m)


Product Family


SRL Application

For vertical use

Lanyard Leg Count



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