Yes. The 3M DBI-SALA 3500278 Nano-Lok Edge is a twin-leg self-retracting lifeline (SRL) built for ANSI Class 2 foot-level tie-off and leading edge (SRD-LE) applications common in construction, metal fabrication, and oil & gas. Its twin-leg design keeps you 100% tied off as you move between anchor points, and each 7.3 ft galvanized-cable leg ends in a large zinc-plated steel rebar hook for connecting to rebar, beams, and large structural anchors. It has a 420 lb (190 kg) capacity for one user, meets 29 CFR OSHA 1910.140, ANSI/ASSP Z359.14-2021, and 29 CFR OSHA 1926.502, and ships with free shipping from Industrial Safety Products.

The 3M DBI-SALA 3500278 Nano-Lok Edge meets or exceeds 29 CFR OSHA 1910.140, ANSI/ASSP Z359.14-2021, and 29 CFR OSHA 1926.502. It is an ANSI Class 2 device rated for foot-level tie-off and leading edge (SRD-LE) applications — tested for use where the anchor is at foot level and the lifeline may pass over a sharp or leading edge.

Under ANSI/ASSP Z359.14-2021, Class 2 self-retracting lifelines are rated for foot-level tie-off — where the anchor point can be at or below the worker's feet — and for leading edge (SRD-LE) use, where the lifeline may run over and be loaded across a sharp structural edge in a fall. The 3M DBI-SALA 3500278 Nano-Lok Edge is built for exactly these conditions, common on decking, steel, and construction leading-edge work, and it locks quickly to arrest a fall within inches.

The 3M DBI-SALA Nano-Lok Edge 3500278 is a self-retracting lifeline (SRL) whose galvanized cable pays out and retracts as you move, keeping constant tension so there's no slack to cause dragging, snapping, or trip falls. If a fall occurs, a quick-activating speed-sensing brake locks the line the instant it senses the fall, stopping it within inches — providing more protection at low heights than a traditional lanyard. A high-capacity external energy absorber cushions the arrest.

The twin-leg design of the 3M DBI-SALA 3500278 Nano-Lok Edge lets you maintain 100% tie-off. As you move or change anchor points, you connect the second leg before disconnecting the first, so you are never unprotected in between. Both legs end in large zinc-plated steel rebar hooks for anchoring, and the unit connects directly to your harness — ideal for moving around rebar, beams, and structures at height.

Each of the twin legs on the 3M DBI-SALA 3500278 ends in a zinc-plated steel rebar hook — a large-opening self-locking hook made for connecting to rebar, scaffold tube, and large structural members that a standard snap hook can't fit around. The harness end uses a stainless steel single-pin connector that mounts directly to the back of most harnesses. The large steel rebar hooks make this the heaviest configuration in the Nano-Lok Edge twin-leg lineup, at about 9.8 lb.

They are the same Nano-Lok Edge twin-leg SRL — ANSI Class 2 leading edge, 420 lb (190 kg) capacity, galvanized cable — and differ mainly in the leg-end connector and length. The 3500278 has large zinc-plated steel rebar hooks on a 7.3 ft lifeline; the 3500276 has steel rebar lock hooks (8 ft); the 3500277 has aluminum rebar lock hooks (8 ft); the 3500280 has aluminum rebar hooks (8 ft); and the 3500279 has standard steel snap hooks (8 ft). Hook style affects both which anchor points you can attach to and the unit weight — the steel-rebar-hook 3500278 is the heaviest at about 9.8 lb, while the snap-hook 3500279 is the lightest at about 7.1 lb. Choose the rebar-hook 3500278 for large structural anchors like rebar and beams; choose the snap-hook model for standard D-rings and anchors.

Yes. The 3M DBI-SALA 3500278 Nano-Lok Edge is a Class 2 SRL designed for foot-level tie-off, where the anchor is at or below your feet and fall clearance is limited. Its speed-sensing brake locks quickly to stop a fall within inches, and the high-capacity external energy absorber limits arrest forces — together providing more protection at low heights than a traditional shock-absorbing lanyard. It is for industrial and occupational use only.

The 3M DBI-SALA 3500278 Nano-Lok Edge has a high-capacity external energy absorber that cushions and limits the forces on your body during a fall arrest, plus a built-in impact indicator. The impact indicator provides a clear visual sign that the SRL has been subjected to a fall, so a supervisor or competent person knows to remove the unit from service and inspect it.

Yes. The 3M DBI-SALA 3500278 Nano-Lok Edge has a built-in stainless steel single-pin connector that mounts directly to the back of most harnesses, so no separate connector is needed. Its compact, ergonomic nylon thermoplastic housing is worn on the user's back, and the twin-leg unit weighs about 9.8 lb (4.44 kg) with its large steel rebar hooks. It ships with free shipping from Industrial Safety Products and is intended for industrial and occupational use only.

The 3M DBI-SALA 3500278 Nano-Lok Edge is RFID equipped, meaning it has a built-in radio-frequency ID tag compatible with inventory-management systems. Safety managers can scan the SRL to log inspections, track service history, and manage their fall-protection equipment inventory, helping keep gear compliant and up to date.

The 3M DBI-SALA 3500278 Nano-Lok Edge has a weight capacity of 420 lb (190 kg) and is rated for a maximum of one user, per 3M's specifications, which covers the worker plus tools and equipment within the rated range. It is a personal twin-leg SRL with a 7.3 ft (2.23 m) galvanized cable lifeline and about 4.3 ft (1.29 m) of working length, and the unit weighs about 9.8 lb (4.44 kg) with its steel rebar hooks.