Tesa Brown Sharpe 599-555-3 Double Square 4R

Product Description

The TESA BROWN SHARPE 599-555-3 is a double square layout and inspection tool featuring a 4-inch blade with 4R graduation. The 4R graduation style provides four scales on a single blade: 1/64 inch, 1/32 inch, 1/16 inch, and 1/8 inch, giving machinists and layout technicians a compact, versatile reference in one tool. The blade interfaces with a square head to allow precise 90-degree reference checks on workpieces, fixtures, and machined surfaces. At 0.5 pounds, the tool is light enough for bench or field use without sacrificing rigidity during close-tolerance layout work.

This double square is suited for machine shops, tool and die environments, and precision fabrication settings where accurate 90-degree checks and fine linear measurements are required in a single handheld instrument. It is a standard bench reference tool used by machinists, inspectors, and layout personnel on both production floors and inspection stations handling close-tolerance metal and composite components.

Key Features

• 4-inch blade length for compact, close-quarters layout work
• 4R graduation style with four increments: 1/64 in, 1/32 in, 1/16 in, and 1/8 in
• Double square design provides 90-degree reference checks in a single tool
• Lightweight at 0.5 pounds for easy handling during extended layout sessions
• Single-piece packaging for individual bench or kit use

Compatibility

Designed as an OEM-style precision layout tool for use in general machining, inspection, and fabrication applications requiring 90-degree reference and 4R-graduated blade measurements.

Installation Notes

This tool requires no installation. Handle with clean, dry hands or cotton inspection gloves to prevent corrosion on precision ground surfaces. Store in a protective case or dedicated tool drawer away from impact hazards to maintain blade flatness and graduation legibility. Calibration checks against a known reference surface are recommended before critical inspection use.