Description
Safewaze FS591-ALU is a dual-leg shock-absorbing lanyard, in lengths of 4-6 ft, with a snap hook at the harness end and an aluminum snap hook at the anchor end. Safewaze describes it: "The PRO 6' Stretch Energy Absorbing Lanyard expands reach and range of movement, while reducing tripping, snag or other hazards. Made from specialized hi-vis performance webbing with POY and elasticized yarns, to create a lightweight, streamlined solution. Includes dual leg for 100% tie-off, protective label cover and forged aluminum hooks." Published figures: ANSI weight capacity 130-310 lb; minimum breaking strength 5,000 lb. Standards Safewaze names: ANSI Z359.12, ANSI Z359.13-2013, OSHA 1926.502, OSHA 1910.140, OSHA 1910.66. Sold individually. Part of the Safewaze PRO Stretch Internal Lanyards series. Ships in 1–2 business days; most orders arrive in 3–7 business days.
Safewaze FS591-ALU specifications
| Item | Safewaze data |
|---|---|
| Part number | FS591-ALU |
| Series | PRO Stretch Internal Lanyards |
| Product type | Shock-Absorbing Lanyards |
| Safewaze title | PRO 6' Stretch Internal Energy Absorbing Lanyard: Dual Leg, Alu Snap Hooks |
| Attachment Points | 3 snap hooks |
| Weight | 2.2 lbs. (1 kg) |
| Length | 4'-6' (1.2-1.8 m) |
| Minimum Breaking Strength | 5,000 lbs. |
| ANSI Weight Capacity | 130-310 lbs. (59-141 kg) |
| Dual (twin) leg | Yes |
| Harness connector | Snap Hook |
| Anchor connector | Aluminum Snap Hook |
Source: Safewaze product page (fetched Nov 6 2026); Safewaze TDS FS591-ALU-TDS, page 1; the 2025 Safewaze file. Where the 2025 file and the current safewaze.com page differ, the page value is shown first and the file value in parentheses.
Ratings and standards
| Standard or rating | As published by Safewaze |
|---|---|
| ANSI/ASSP Z359.12, connecting components for personal fall arrest systems | Named by Safewaze (TDS FS591-ALU-TDS page 1). |
| ANSI/ASSP Z359.13, personal energy absorbers and energy absorbing lanyards, 2013 edition | Named by Safewaze (safewaze.com page, TDS FS591-ALU-TDS page 1). |
| OSHA 29 CFR 1926.502, fall protection systems criteria and practices (construction) | Named by Safewaze (safewaze.com page, TDS FS591-ALU-TDS page 1). |
| OSHA 29 CFR 1910.140, personal fall protection systems (general industry) | Named by Safewaze (safewaze.com page, TDS FS591-ALU-TDS page 1). |
| OSHA 29 CFR 1910.66, powered platforms for building maintenance | Named by Safewaze (safewaze.com page, TDS FS591-ALU-TDS page 1). |
| Weight capacity | ANSI 130-310 lb, as Safewaze publishes it. |
| Minimum breaking strength | 5,000 lb, as Safewaze publishes it. |
Source: Safewaze product page (fetched Nov 6 2026); Safewaze TDS FS591-ALU-TDS, page 1; the 2025 Safewaze file. Ratings are as published by the manufacturer or the named standard, not a recommendation for any task; the end user decides suitability.
Documents
- Technical data sheet — Safewaze FS591-ALU-TDS (PDF)
- User manual — Safewaze MANUAL-LAN-Lanyard-V3 (PDF, 40 pages)
- Declaration of conformity — Safewaze SW24DC022-FS596 (PDF)
- Technical bulletin: OSHA Capacity Range — Safewaze 2024-Technical-Bulletin-OSHA-PFAS-Capacity-Range-00237 (PDF)
- Technical bulletin: Compatibility of Products — Safewaze 2024-02_2024-Technical-Bulletin-Compatibility-of-Products-00236 (PDF)
- Safewaze lanyard inspection checklist (PDF)
- Safewaze fall clearance chart (PDF)
Source: Safewaze product page resources and the Safewaze technical library, fetched Nov 6 2026. Each link opens the Safewaze PDF.
Features
- Stretches from 4' to 6'
- 1 3/8" elasticized Poly/POY web
- 3 forged aluminum snap hooks
- Protective label cover
- Dual leg construction
Source: Safewaze feature list for FS591-ALU, as published on the safewaze.com product page.
Safewaze FS591-ALU family
Other Safewaze versions of this item
These part numbers were sold on this page before; each now has its own page with its own price and sizes.
| Part number | Item | Key figure |
|---|---|---|
| FS590 | PRO FS590 Shock-Absorbing Lanyards, 6 ft Stretch Internal, Snap Hook | ANSI 130-310 lb |
| FS595 | PRO FS595 Shock-Absorbing Lanyards, 6 ft Stretch Internal, Rebar Hook | ANSI 130-310 lb |
| FS590-ALU | PRO FS590-ALU Shock-Absorbing Lanyards, 6 ft Stretch Internal | ANSI 130-310 lb |
| FS595-ALU | PRO FS595-ALU Shock-Absorbing Lanyards, 6 ft Stretch Internal | ANSI 130-310 lb |
| FS66100 | PRO FS66100 Shock-Absorbing Lanyards, 6 ft Stretch Internal, O-Ring | ANSI 130-310 lb |
| FS596-ALU | PRO FS596-ALU Shock-Absorbing Lanyards, 6 ft Stretch Internal, Dual Leg | ANSI 130-310 lb |
| FS66150 | PRO FS66150 Shock-Absorbing Lanyards, 6 ft Stretch Internal, Dual Leg | ANSI 130-310 lb |
| FS596 | PRO FS596 Shock-Absorbing Lanyards, 6 ft Stretch Internal, Dual Leg | ANSI 130-310 lb |
| FS591 | PRO FS591 Shock-Absorbing Lanyards, 6 ft Stretch Internal, Dual Leg | ANSI 130-310 lb |
| FS66150-ALU | PRO FS66150-ALU Shock-Absorbing Lanyards, 6 ft Stretch Internal | ANSI 130-310 lb |
Source: Safewaze product page (fetched Nov 6 2026); Safewaze TDS FS591-ALU-TDS, page 1; the 2025 Safewaze file. Each part number links to its own page.
Safewaze FS591-ALU questions
What standards does Safewaze list for the Safewaze FS591-ALU? ANSI/ASSP Z359.12, connecting components for personal fall arrest systems, ANSI/ASSP Z359.13, personal energy absorbers and energy absorbing lanyards, 2013 edition, OSHA 29 CFR 1926.502, fall protection systems criteria and practices (construction), OSHA 29 CFR 1910.140, personal fall protection systems (general industry), OSHA 29 CFR 1910.66, powered platforms for building maintenance. Ratings are as published by Safewaze; the end user decides suitability for the task.
What is the weight capacity of the Safewaze FS591-ALU? ANSI 130-310 lb, as Safewaze publishes it.
What connectors does the Safewaze FS591-ALU have? Snap Hook at the harness end; Aluminum Snap Hook at the anchor end, as Safewaze lists it.
Does the Safewaze FS591-ALU have a shock absorber? Yes; Safewaze titles it an energy absorbing lanyard and lists ANSI Z359.13-2013.
How long is the Safewaze FS591-ALU? 4-6 ft.
Guides: parts of a personal fall arrest system · how to calculate fall clearance · arrest vs restraint vs positioning · what an SRL is · carabiners and snap hooks · every fall protection item by type and standard.
Manufacturer item number: FS591-ALU. Technical data sheet: Safewaze TDS (PDF).
