Starrett 52678 Steel Rule 6 Inch 4R Graduation Rigid

Product Description

The STARRETT 52678 is a rigid steel rule designed for precise linear measurement in trade and industrial applications. Manufactured from spring steel with a satin chrome-plated finish, this 6-inch rule delivers clear, easy-to-read graduations across four scales: 1/16, 1/32, 1/64, and 1/8 inch, following the 4R graduation style. At 3/4 inch wide and 0.05 inches thick, it sits flat against workpieces without flexing, making it reliable for layout, inspection, and fabrication tasks. HVAC technicians, pipefitters, electricians, and plumbers reach for rules like this daily when checking cutout dimensions, verifying clearances, or laying out rough-in measurements.

This rule is suited for bench work, field service, and shop use wherever a compact, rigid 6-inch reference is needed. The horizontal scale orientation makes it straightforward to read along a workpiece edge. The satin chrome finish reduces glare under shop lighting, keeping graduation marks visible in a variety of lighting conditions. It does not include a hook end and is not magnetic, keeping it simple and lightweight for everyday carry in a tool pouch or kit bag.

Key Features

• 4R graduation style with four scales: 1/16, 1/32, 1/64, and 1/8 inch
• Spring steel construction for durability and dimensional stability
• Satin chrome-plated finish reduces glare and resists corrosion
• Rigid body — 0.05 inches thick — holds flat against surfaces without bowing
• Compact 6-inch overall length fits tool pouches and small kits
• Horizontal scale orientation for straightforward edge-referenced reading

Compatibility

Designed as a standard 6-inch rigid steel rule suitable for general-purpose measurement in HVAC, plumbing, electrical, and mechanical trade applications.

Installation Notes

No installation is required for this hand tool. Store away from abrasive materials that could scratch graduation markings. Wipe clean with a dry or lightly oiled cloth to prevent surface oxidation over time. Avoid using the rule as a cutting guide with utility knives, as repeated scoring will damage the graduation markings.