Spi 13-271-2 Combination Square Set 24 Inches 3 Piece

Product Description

The SPI 13-271-2 is a 3-piece combination square set built for precise layout and measurement work in the field or shop. The set includes a 24-inch hardened steel blade and a cast iron center square head, delivering the rigidity and accuracy that trade professionals expect. Graduation follows the 4R system, providing four reading scales: 1/16, 1/32, 1/64, and 1/8 inch. This set is suited for machinists, pipefitters, sheet metal workers, and other tradespeople who require reliable, repeatable linear and angular measurements across a range of layout tasks.

This combination square set is designed for professional use in industrial, mechanical, and construction trade environments. It handles common layout operations including marking 90-degree and 45-degree angles, scribing lines, checking flatness, and measuring depth or height. The cast iron center square head provides stable clamping and consistent registration against a workpiece edge. At 24 inches, the blade length supports layout work on larger stock or structural components where shorter rules fall short.

Key Features

• 24-inch hardened steel blade resists wear and maintains accuracy under repeated use
• Cast iron center square head for durable, stable head-to-blade clamping
• 4R graduation system: 1/16, 1/32, 1/64, and 1/8 inch scales on a single blade
• 3-piece set supports multiple measurement and layout configurations
• Blade length suits large-format layout work on structural or sheet material

Compatibility

Designed as a standard combination square set for professional layout and measurement applications in mechanical, machining, and trade service environments.

Installation Notes

Combination square sets do not require installation, but proper use and storage affect long-term accuracy. Keep the blade and head free of chips and debris before clamping to a workpiece to ensure square registration. Inspect the blade for straightness and verify head-lock tightness before critical layout work. Store the set protected from impacts that could damage the cast iron head or bow the blade.