3504422 – Ultra-Lok edge (SRL) Self Retracting Lifeline – 15 ft. (4.5m) – Steel lifeline w/ steel snap hook – Single leg – For horizontal use / leading edge – Anchorage loop for mounting

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  • 15 ft. (4.5m) – 7/32″ (5.5mm) galvanized steel cable lifeline
  • Swiveling anchorage point – for anchoring SRL
  • Steel snap hook – for attachment to harness to prevent falls
  • Designed for foot-level tie-off and sharp edge applications
  • Equipped with 3M™ Connected Safety ID (CSID)
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15 ft. (4.5m) of 7/32″ (5.5mm) galvanized steel wire rope with swivel snap hook and in-line shock absorber for leading edges.

    • Single-leg – 15 ft. (4.5m) 7/32″ (5.5mm) galvanized steel cable lifeline
    • Steel snap hook on end of lifeline for attachment to support structure
    • Swiveling anchorage loop
    • Designed for foot-level tie-off and sharp edge applications
    • Energy absorber saves lives by absorbing deadly falling forces
    • Long lasting – Semi-sealed design protects moving parts from grime, dirt & sludge

Leading Edge SRL's

Leading Edge SRL's are intended for use when no overhead anchor point is available and foot-level tie-off is your only option.

This type of SRL is ideal for users working at more 6ft. fall clearance and along leading and sharp edges. When users are tied-off at foot level they are at risk for a greater fall, but these devices are designed to limit a fall within 18-24 inches; minimizing the chance of injury. Leading-edge SRL's are also equipped with deal with 'sharp edges' which are razor thin corners small enough to cut through traditional lifelines.

Leading-edge Vs. Regular SRL's
  • Leading edge SRL's are designed for foot-level tie-off
  • Leading edge SRL lifelines are designed for use on sharp edges
  • Works well with the self-rescue system


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.


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

Weight10.00 lbs
Dimensions6 × 6 × 6 in
Connection Material

Galvanized steel

Hook type to Harness

Snap Hook

Hook type to structure

Anchorage loop

Overall Length

15 ft. (4.5m)


Product Family

Lifeline Material

Galvanized Cable

SRL Application

For horizontal use

Lanyard Leg Count



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