Super Anchor 4015V ValueGrab Prussic Rope Grab 2-Pack – Integrated Z359 Snaphook
The Super Anchor 4015V ValueGrab Prussic Rope Grab is a dependable alternative to mechanical rope grabs, utilizing a prussic knot design to ensure a secure grip on 5/8” lifelines. This versatile rope grab maintains its hold even in challenging conditions, such as wet or frozen environments, offering unmatched reliability for residential and commercial roofers. The ValueGrab is engineered for use in both standard and reverse lifeline setups, making it an excellent choice for a wide range of fall protection applications. Equipped with a permanently swaged Z359 snap hook rated at 3,600 pounds of gate strength, this device simplifies your connection while maintaining robust performance. For the best results, pair this with a Super Anchor 4020 Lifeline.

Key Features of the Super Anchor 4015V ValueGrab
- Prussic Knot Design: Offers consistent, slip-resistant gripping on lifelines, even in adverse weather conditions.
- Integrated Z359 Snaphook: Permanently swaged for reliable connections with 3,600-pound gate strength.
- Dual Usage Modes: Use traditionally attached to the harness or in reverse, with the grab at the anchor point to minimize trailing lifeline slack.
- Durable Construction: Made from 7/16” nylon/poly rope with a minimum breaking strength of 5,000 pounds.
- Smooth Operation: The prussic knot resists snagging and won’t scratch metal roofing surfaces, ensuring efficient movement.
Advanced Safety and Compliance for 2026
The 4015V ValueGrab meets or exceeds OSHA 1926:502 standards, providing top-tier safety for fall-arrest and fall-restraint applications. Its built-in bidirectional locking mechanism ensures a quick response to ascending or descending forces, engaging the locking feature within a few inches of slip. The compact design also minimizes deceleration distance to 12 inches, significantly reducing the impact forces transmitted to the worker during a fall. If you require a version with a protective cover to visualize impact loads, consider the Super Anchor 4015 SuperGrab.
4015V ValueGrab Technical Specifications:
- Device Type: Prussic-style rope grab with captive Z359 snap hook
- Lifeline Compatibility: 5/8” (16mm) Vertical Lifelines
- Breaking Strength: 5,000 lbs minimum; 7,400 lbs average tensile
- Hardware: Permanently Swaged 3,600 lb Gate-Rated Snap Hook
- Deceleration Distance: 12 Inches Max
- Compliance: OSHA 1926:502
Super Anchor 4015V Technical Resources:
- Super Anchor 4015V Rigging Manual – Expert guide for reverse rigging and slack management.
- Super Anchor 4015V Lifeline Manual – Detailed guide for vertical lifeline inspection and maintenance.
Super Anchor 4015V ValueGrab FAQ
1. What is the benefit of the swaged snap hook?
The permanently swaged snap hook eliminates the need for separate carabiners, reducing the risk of dropping or losing hardware on the job site. It ensures a captive, secure connection that meets the 3,600 lb gate strength requirements of ANSI and OSHA.
2. How does the prussic knot perform in freezing weather?
Unlike mechanical rope grabs that can seize when lifelines are covered in ice, the prussic knot actually increases its friction and grip as it tightens. This makes the 4015V the preferred choice for winter roofing and high-moisture environments.
3. Can this grab be used for "Reverse Lifeline" rigging?
Yes. The bi-directional locking of the prussic knot allows you to attach the snap hook to your anchor point and run the lifeline through the grab. This allows the worker to manage the rope slack at the anchor rather than carrying it on their harness.
4. Does this rope grab work on 1/2-inch lifelines?
No. The ValueGrab is precision-tied for use only with 5/8" (16mm) vertical lifelines. If you are using a mechanical system that requires a metal-on-rope connection, you may want to compare this to the Super Anchor 4015-Z Mechanical Rope Grab.
5. How do I know when to replace the ValueGrab?
The device must be replaced immediately if the prussic rope shows any signs of fraying or glazing, or has been subjected to a fall. For those setting up a new site, we recommend using this grab in combination with a high-strength Super Anchor 3013-D Reusable Anchor for a fully compliant system.
6. Can I tie my own prussic rope to save money?
No. The 4015V is a factory-certified fall protection component. Tying your own rope grab would not be OSHA-compliant, as it lacks the required testing, labeling, and swaged hardware certifications for industrial safety.
7. How do I avoid common mistakes with the 4015V?
- 1. Knot Dressing: Always ensure the prussic knot is "dressed" (tight and flat) against the lifeline before use.
- 2. Hardware Inspection: Check the snap hook gate for smooth operation and ensure the spring is fully closing and locking.
- 3. Chemical Exposure: Avoid storing the rope grab near gasoline, battery acid, or harsh cleaning chemicals that can degrade the nylon/poly fibers.