Spi 13-355-3 Combination Square Set 12 Inches 2 Piece

Product Description

The SPI 13-355-3 is a 2-piece combination square set built for layout, inspection, and measurement work across a range of trades and industrial applications. The set includes a 12-inch hardened steel blade and a hardened steel square head, providing a rigid, durable tool that holds calibration under regular shop use. Graduation is dual English and Metric, with increments of 0.02 inch, 0.03 inch, 0.5 inch, and 1 mm, giving the user fine resolution for both systems without switching tools. The hardened steel construction resists wear on blades, workbenches, and metal surfaces. Weighing 3 pounds, the set is substantial enough for stable positioning during layout work.

This combination square set is suited for machinists, pipefitters, fabricators, carpenters, and maintenance technicians who need reliable 90-degree and 45-degree reference, scribe lines, and depth checks. It works equally well in fabrication shops, maintenance facilities, and field installation environments where both English and Metric measurements are required. The square head design locks onto the blade at any point along its 12-inch length, making it adaptable for a wide range of layout and transfer tasks.

Key Features

• 12-inch hardened steel blade for durability and resistance to wear
• Hardened steel square head for stable, repeatable 90-degree reference
• Dual English and Metric graduation on a single blade
• Fine graduation increments: 0.02 inch, 0.03 inch, 0.5 inch, and 1 mm
• 2-piece set includes blade and square head
• Compact and portable at 3 pounds for field and shop use

Compatibility

Designed as a general-purpose combination square set suitable for layout, inspection, and measurement tasks in machining, fabrication, plumbing, and general trade applications.

Installation Notes

No power source or lockout procedure is required for hand measurement tools of this type. Ensure the blade locking mechanism is fully tightened before scribing or transferring measurements to avoid blade shift. Clean the blade and head contact surfaces regularly to maintain accurate 90-degree reference. Store the set in a protective case or sleeve to prevent blade edge damage and preserve graduation legibility.