Nano-Lok™ Twin-Leg Quick Connect Self Retracting Lifeline - Web

Description: 6 ft. (1.8m) twin-leg lifelines with 3/4" (19mm) Dyneema® fiber and polyester web and aluminum rebar hooks, quick connector for harness mounting.


  • Twin-leg 100% tie-off design
  • Built-in connector for twin-leg SRL direct attachment to harness


Nano-Lok™ Self Retracting Lifelines Video - English

Nano-Lok™ Installation Tutorial


Nano-Lok™ is ergonomically designed for ease-of-use and is ideal for direct connection to most harnesses. The extremely compact and lightweight design is virtually unnoticeable on your back, staying out of the worker’s way and making it ideal as a lanyard replacement. Whether your application requires single or twin leg configurations, mounting to an overhead anchor or for connection directly to harness, there are more than 30 models to choose from to suit almost any application. Nano-Lok™ locks quickly—stopping a fall within inches—providing more protection at low heights. In addition, tension is always kept on the lifeline, which reduces dragging, snapping and trip falls. Both features are key safety improvements.


Twin-leg 100% tie-off design

Allows user to “leap-frog” while moving from one location to another for added mobility and 100% fall protection.

Built-in connector for twin-leg SRL direct attachment to harness

Installs to the webbing of harness, leaving the dorsal D-ring open for other equipment or rescue. Designed to provide a snug fit to the worker's back, eliminating nuisance flopping.

6 ft. (1.8m) twin-leg lifelines with 3/4" (19mm) Dyneema® fiber and polyester web

The synthetic lifelines reduce overall weight and the retractable design provides freedom of movement, keeps the lifeline out of the worker's way and reduces dragging, snagging and trip falls.

Aluminum self-locking rebar hook on each lifeline

Automatically locks and closes for added safety, and its 2-1/4" (57mm) large gate opening fits over larger anchorage structures.

Extremely compact, lightweight design

The devices are virtually unnoticeable on your back, stay out of the way and can be easily used as a lanyard replacement.

Tough and impact resistant thermoplastic housing

Compact and durable housings are designed to withstand the demands of challenging jobsites, they are built to last.

Swiveling anchorage loops

Limits lifeline twisting for smoother operation and added worker satisfaction.

Quick activating speed sensing brake systems

Stops a falling worker within inches, providing more protection at low heights. Designed for smooth consistent operation allowing the user to maintain normal work pace and not be interrupted with constant lock ups.

High capacity external energy absorbers and impact indicators

Specialized built-in external absorption systems maintain safe fall arrest forces for users and tools up to 420 lbs. (190 kg) and provide a visual alert that the SRL has been involved in a fall.

i-Safe™ equipped

A built-in RFID identification tag helps the user record and store information on inspections.

Wide variety of configurations available

There are more than 30 models to choose from to suit almost any application for complete jobsite versatility and flexibility.


Capacity 420 lbs. (190 kg)
Sub Brand Nano-Lok™
Size 6 ft. (1.8 m)
Velocity Ship Yes
iSafe Equipped Yes
Lifeline Length 6 ft. (1.8 m)
Housing Nylon Thermoplastic
Lifeline Hook Aluminum
Lifeline 3/4" (19mm) wide Dynema polyester web
Model 3101277
Physical Dimensions 22.40x3.50x2.00 (in)
Physical Weight 5.60 lbs (2.5kg)
Product Styles Twin Lifelines (100% tie-off)
Product Types Harness Mounted
Housing Type Thermoplastic
Lifeline Type Web
Mounting Type Direct to Harness Back
Weight Group Less than 5 lbs. (2.3 kg)
Standards ANSI Z359.14, OSHA 1910.66, OSHA 1926.502, Capital Safety Gen. Mfg. Req., ANSI A10.32

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