The 3M™ DBI-SALA® Nano-Lok™ Edge Self-Retracting Lifeline (SRL) series—models 3500252 and 3500253—offers a reliable and compact solution for fall protection in foot-level tie-off and leading edge applications. Engineered for direct connection to the harness back D-ring, this series combines advanced safety technology with ergonomic comfort to support active movement in high-risk environments.

Both SRLs are rated for ANSI Class 2 leading edge exposure and include a quick-acting speed-sensing brake system that halts falls within inches. A high-capacity energy absorber and integrated impact indicator help provide added security, while RFID functionality enables digital equipment tracking and simplified inspections. Designed with rugged thermoplastic housing and galvanized steel cable, these lifelines are built to perform in harsh construction and industrial conditions.

Key Features

ANSI Class 2 Rated: Engineered for foot-level tie-off and leading edge hazards.
Quick-Connect Harness Mount: Built-in connector for direct attachment to most harnesses.
Compact Housing: Thermoplastic body stays close to the back for maximum mobility.
Rapid Brake Activation: Speed-sensing system stops falls quickly, enhancing safety at low heights.
External Energy Absorber: Manages fall forces and provides visual impact feedback.
RFID Enabled: Supports digital inspections and asset management.
Galvanized Cable Lifeline: Durable and corrosion-resistant for rugged jobsite performance.

Intended Use

Construction and General Industrial Environments: Especially where fall hazards exist at foot level or near sharp edges.
Direct-to-Harness Applications: Reduces trip risk and enhances range of motion.
Worksites With Height Restrictions: Optimized for use in low-clearance scenarios.

Product Specifications

Shared Specifications for Both Models (3500252 & 3500253):

Lifeline Material: Galvanized cable
Lifeline Length: 8 ft (2.4 m)
Hook Types: Flat steel rebar hook
Housing Material: Nylon thermoplastic
Mounting Type: Direct to harness back D-ring
Weight Capacity: 310 lbs (141 kg)
RFID Equipped: Yes
Edge Application: Leading edge, foot-level tie-off approved

Configuration:
3500252 : Single-leg
3500253 : Twin-leg

Product Weights:
3500252: 4.5 lb
3500253: 5.0 lb

Certifications and Standards

CSA Z259.2.2 Type 1
Capital Safety General Manufacturing Requirement
ANSI Class 2 Compliant (Leading Edge Rated)