3503821 – Smart Lock (SRL) Self Retracting Lifeline – 35 ft. (11m) – Stainless Steel Cable w/ Snap Hook – Anchor w/ Carabiner – For Vertical Use

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  • 35 ft. (11m) stainless steel lifeline
  • For vertical use
  • 4ft. fall clearance up to 310 lbs or 6ft. up to 420 lbs.
  • Magnetic retraction control
  • Thermoplastic housing
  • Swiveling anchorage carabiner & snap hook
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35 ft. (11m) of 3/16″ stainless steel cable lifeline w/ swiveling snap hook, 4ft. fall clearance (310 lbs), magnetic retraction control, anchorage carabiner.

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 - what's 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.



Work smarter, not harder.

Spending less time fixing lockups and simplifying inspections SIGNIFICANTLY increases productivity and morale.

Feature packed SRL

Ergonomic handle - Allow easy transport between job-sites and makes it easier to install overhead

Magnetic retraction control - Lifeline rewinds at a smooth pace, minimizing the chance of harm to people or equipment.

Dual label system - The extra label on the lifeline allows the user to access critical information without have to go all the way back to the housing to get it.

HI-VIS Shock Absorbers - Horizontal lifeline modals feature high visibility orange shock absorbers which makes it much easier to tell if workers are tied-off.

Fewer unintentional lock ups - After millions of tests 3M Fall Protection created a smart SRL with 29% FEWER lockups.

Swiveling Carabiner & Anchorage - Ensures that the user is not in any way limited in movement due to the SRL anchorage.

3M™ DBI-SALA® Smart Lock Self-Retracting LifelinesApplicationPart #LengthLifeline MaterialVertical (Overhead)350380320 ft.Galvanized Steel350380420 ft.Stainless Steel350380030 ft.Galvanized Steel350380130 ft.Stainless Steel350382035 ft.Rope350382135 ft.Stainless Steel350382450 ft.Galvanized Steel350382350 ft.Stainless SteelHorizontal (Leading Edge)350380220 ft.Galvanized Steel350382230 ft.Galvanized Stee

Additional information

Weight15.24 lbs
Dimensions24 × 9 × 4 in
Overall Length

35 ft. (11m)


Product Family

Lifeline Material

Stainless Steel Cable

SRL Application

For vertical use

Lanyard Leg Count


Hook type to structure


Hook type to Harness

Snap Hook


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