Nano-Lok™ edge Twin-Leg Quick Connect Self Retracting Lifeline - Cable

Description: 8 ft. (2.4m) twin-leg lifelines with 3/16" (5mm) galvanized steel wire rope and aluminum rebar locking hooks, quick connector for harness mounting.


  • Designed for foot-level tie-off and sharp edge applications
  • Twin-leg 100% tie-off design


Nano-Lok™ Self Retracting Lifeline Video - English


Nano-Lok™ edge is specifically designed for foot level tie-off and sharp edge applications often found in construction. It 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 numerous 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.


Designed for foot-level tie-off and sharp edge applications

An innovative combination of lifeline material, energy absorption, and harness connection reduce forces on both the worker and the edge.

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.

8 ft. (2.4m) twin-leg lifelines with 3/16" (5mm) galvanized steel cable lifeline

Abrasion resistant and extremely durable lifeline construction provides added field longevity.

Aluminum rebar lock hooks on each lifeline

Automatically lock and close for added safety, and the aluminum construction is lightweight and built to last.

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.

Integrated backpack style energy absorber

Stays tight to the harness evenly dispering the unit's weight and limits forces to protect against sharp edges.

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 16 models to choose from to suit almost any application for complete jobsite versatility and flexibility.


Capacity 310 lbs. (141 kg)
Sub Brand Nano-Lok™
Size 8 ft. (2.4 m)
Velocity Ship Yes
iSafe Equipped Yes
Lifeline Length 8 ft. (2.4 m)
Lifeline 3/16" (5mm) dia. 7x19 Galvanized Aircraft Wire Rope
Housing Nylon Thermoplastic
Lifeline Hook Aluminum and Zinc Plated Steel
Model 3500231
Physical Weight 8.10 lbs (3.7kg)
Product Styles Twin Lifelines (100% tie-off)
Product Types Harness Mounted
Housing Type Thermoplastic
Lifeline Type Galvanized Cable
Mounting Type Direct to Harness Back
Weight Group 5 to 10 lbs. (2.3 to 4.5 kg)
Standards ANSI Z359.14, OSHA 1910.66, OSHA 1926.502, Capital Safety Gen. Mfg. Req., ANSI A10.32

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