3100521 Nano-Lok Personal Self-Retracting Lifeline with Anchor Hook, Web Steel Swivel Snap, 6 ft., Class 1, ANSI – 3M DBI-SALA

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  • Swiveling anchorage loop with carabiner
  • Quick activating speed sensing brake system
  • Self-locking snap hook on lifeline
  • Compact & lightweight design
  • Durable thermoplastic housing
  • High capacity external energy absorber and impact indicator
  • RFID equipped and capatible with inventory management system
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ANSI Class Level

Class 1

Anchor Connection Type


Anchor Hook Material

Zinc Plated Steel

Anchor Hook Material

Zinc Plated Steel

Average Arrest Force (Imperial)

1125 lbf (OSHA 130 lb – 310 lb), 1125 lbf (ANSI)

Average Arrest Force (Metric)

5 kN (OSHA 130 lb – 310 lb), 5 kN (ANSI)



Connected Safety ID Equipped


Housing Material

Nylon Thermoplastic

Housing Type


Install Type

Portable & Removable

Leg Count


Lifeline Connection Type

Swivel Snap Hook

Lifeline Hook Material

Zinc Plated Steel

Lifeline Length (Imperial)

6 ft

Lifeline Length (Metric)

1.8 m

Lifeline Material


Maximum Arrest Force (Imperial)

1800 lbf (OSHA 130 lb – 310 lb), 1800 lbf (ANSI)

Maximum Arrest Force (Metric)

8 kN (OSHA 130 lb – 310 lb), 8 kN (ANSI)

Maximum Number of Users


Mounting Type

Overhead Anchor Point

Overall Length (Imperial)

6 ft

Overall Length (Metric)

1.83 m

Product Color


Product Series


Product Type

Self Retracting Lifeline with Anchor Hook – Web

Recommended Industry

Transportation, Renewable, Wind Energy, General Industrial, Utility, Automotive, Warehousing, Pharmaceutical, General Manufacturing, Maintenance, Utilities, Military Maintenance, Repair & Operation (MRO), Metal Production & Fabrication, General Industry, Metal Fabrication, Manufacturing, Mining, Oil & Gas, Industrial, Construction

Specifications Met

29 CFR OSHA 1910.140, 29 CFR OSHA 1926.502, ANSI/ASSP Z359.14-2021

Weight (Imperial)

3.006 lb.

Weight (Metric)

1.363 kg

Weight Capacity (Imperial)

420 lb.

Weight Capacity (Metric)

190 kg

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.



Nano-lok SRL

These little devices make a big difference when it comes to working at height.

The new Nano-lok SRL's are easy to install, smaller and even take more of a beating than the previous model could.

Next-gen Features
  • Installation is 60% quicker
  • Rubber cover lasts 4x longer than the previous model
  • 4ft. overhead fall clearance per OSHA 1910
  • ANSI Class A/B models limit falls within 24"
  • 6ft. fall clearance required on Class B SRL's
  • Knee-level of higher tie-off.

"Nano-lok SRL's are the lightest ANSI certified SRL that allows for knee level tie-off."


Additional information

Weight2.7 lbs
Dimensions6 × 6 × 6 in
Hook type to structure


Hook type to Harness

Swivel Snap Hook

Overall Length

6 ft. (1.8m)


Product Family

Lifeline Material

Web Rope

SRL Application

For vertical use

Lanyard Leg Count



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