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Stanley 43-525 FATMAX Magnetic Box Level (24-inch)
The Stanley 43-525 is a 24-inch (600 mm) heavy-duty FATMAX magnetic box level designed for precision alignment and durability in demanding industrial and structural environments. Constructed from a single-piece aluminum box-beam, it offers superior strength and maintains consistent accuracy throughout rigorous daily use. The level is equipped with rare earth magnets for secure, hands-free attachment to ferrous surfaces, making it an essential hand tool for contractors, technicians, and infrastructure installers.
This level features three vials, including a specialized MaxEdge bridged center vial that provides an uninterrupted marking surface across the beam. The highly precise block vials deliver a maximum working accuracy of 0.0005 in/in (0.5 mm/m). Additional protective features, such as shock-absorbing end caps and side bumpers, help prevent damage to finished surfaces and maintain the physical integrity of the tool during accidental drops.
Key Features & Specifications
- Length: 24 inches (600 mm)
- Frame Construction: Single-piece aluminum box-beam
- Vial Configuration: 3 precision block vials
- Center Vial: MaxEdge bridged center vial allows for a continuous continuous marking edge
- Measuring Accuracy: 0.0005 in/in (0.5 mm/m)
- Magnetic Interface: Embedded rare earth magnets for strong holding power on metal infrastructure
- Tool Protection: Integrated shock-absorbing end caps and side bumpers to protect both the tool and finished workpieces
Frequently Asked Questions
Q: What is the measuring accuracy of the Stanley 43-525 FATMAX box level?
A: The precision block vials on this level provide a maximum accuracy of 0.0005 in/in (0.5 mm/m).
Q: Does this level have built-in magnets for metal surfaces?
A: Yes, it features rare earth magnets integrated directly into the frame to provide a secure, hands-free hold on ferrous materials, racks, and structural conduit.

