3M 3503872 Self-retracting Lifeline 20 Ft

Product Description

The 3M 3503872 is a Smart Lock Self-Retracting Lifeline (SRL) designed for at-height fall protection in trade and industrial work environments. The unit uses an advanced arrest mechanism engineered to distinguish between a fall event and normal work motion, reducing nuisance lockups that interrupt workflow. At 11.18 pounds, this SRL provides a 20-foot lifeline length suited to a range of elevated work scenarios. Installation and inspection procedures are streamlined into the design, making it a practical choice for safety professionals managing active job sites.

This self-retracting lifeline is intended for use in residential and commercial construction, industrial maintenance, and other applications requiring compliant fall arrest equipment. It is sold as a single unit and is suited for workers performing typical at-height tasks where standard lanyards present limitations. The Smart Lock mechanism was developed using motion capture data gathered during real-world elevated work tasks, making it appropriate for dynamic work environments where movement patterns vary.

Key Features

• Advanced arrest mechanism reduces nuisance lockups during normal work motion
• Motion-capture-engineered fall detection differentiates falls from routine movement
• 20-foot lifeline length for versatile at-height coverage
• Designed for simplified field inspection and maintenance checks
• Sold as a single unit for individual worker deployment

Compatibility

Designed as an OEM-style self-retracting lifeline for use with compatible full-body harness fall arrest systems meeting applicable ANSI and OSHA fall protection standards.

Installation Notes

Self-retracting lifelines must be installed and inspected by a qualified person familiar with OSHA 29 CFR 1926 Subpart M fall protection requirements. The anchorage point must be rated for fall arrest loads before connecting the SRL. Inspect the lifeline, housing, and swivel connector before each use and remove the unit from service if any damage is found. Never modify the device or use it for purposes outside its rated application.

Technical Specifications

• Lifeline Length: 20 feet
• Weight: 11.18 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 1
• UPC: 648250239391

Standard Information

• Brand: 3M
• Manufacturer Part Number: 3503872