The 3M™ DBI-SALA® Rollgliss™ R550 Rescue and Descent Device – 3325050 is a high-performance, fully automatic controlled descent system designed for emergency evacuation and assisted rescue from heights. Built with 50 ft (15.2 m) of super static kernmantle rope, this device offers smooth, controlled descent for one or two users and includes integrated connection hardware at both ends to allow operation in either direction.

Ideal for use in environments like wind turbine construction, utility maintenance, fire rescue, and industrial ladders, the R550 supports controlled descent, assisted rescue with lifting capability, and quick deployment using its detent-style ladder bracket (sold separately). With rugged construction and ergonomic features, the R550 delivers safety, speed, and simplicity when every second matters.

Key Features

Multi-Purpose Functionality
Performs controlled descent, evacuation, or assisted rescue with lifting.
Bidirectional Operation
Allows descent from either end of the rope, with connection hardware on both ends.
Automatic Speed-Controlled Descent
Built-in braking system regulates descent speed safely without user input.
Supports One or Two Users
Rated for a single user up to 310 lb (141 kg) or two users totaling 620 lb (282 kg).
Includes Super Static Lifeline
Comes with 50 ft (15.2 m) of 3/8 in. (9.5 mm) kernmantle rope with a braided polyester cover and nylon core.
Compact & Durable Housing
Constructed with aluminum and corrosion-resistant internal components.
Ladder Bracket Compatibility
Can be mounted using a detent-style ladder bracket (sold separately) for rapid ladder-based deployment.
Optional Rescue Wheel
Some models offer a Supertough® nylon ergonomic wheel for controlled lifting.
Optional sealed humidity case offers long-term, ready-to-use storage with external indicator.

Intended Use

Built for use in vertical descent and rescue situations, the R550 is recommended for:

Wind energy and tower work
Utility pole and ladder evacuations
Fire rescue and emergency services
Mining, oil & gas, and construction applications
Military and government operations

This system is not for user-controlled ascent but supports co-worker-assisted lifting.

Product Specifications

Model Number: 3325050
3M ID / SAP ID: 7012818872
Legacy SKU: 70804437583
Rope Length: 50 ft (15.2 m)
Descent Type: Vertical

User Control:
Descent: Yes
Ascent: Co-worker assisted only

Lifeline Material: Kernmantle – polyester sheath, nylon core
Rope Diameter: 3/8 in (9.5 mm)
Housing Material: Aluminum
Carabiner Material: Zinc-plated steel
Overall Weight: 10.9 lb (4.95 kg)
Color: Yellow housing
Weight Capacity:
1 person: 130–310 lb (59–141 kg)
2 persons: 130–620 lb (59–282 kg)


Certifications and Standards

Meets OSHA and ANSI descent device standards
Complies with applicable fall protection rescue regulations
Designed for industrial rescue and emergency evacuation with high durability and ease of use