Spi 13-255-5 12 Inch Combination Square Set 2 Piece

Product Description

The SPI 13-255-5 is a 2-piece combination square set built for layout, inspection, and measurement work in shop and field environments. The set includes a 12-inch hardened steel blade and a cast iron square head, providing durability under regular trade use. Graduation runs in both English and Metric scales, with increments of 0.02 inches, 0.03 inches, 0.5 inches, and 1 mm, giving machinists, pipefitters, and fabricators precise reference marks in either system. The hardened blade resists wear and deflection during repeated use, and the cast iron head delivers consistent 90-degree and 45-degree reference angles for scribing, checking squareness, and depth measurement.

This combination square set is suited for use in machine shops, fabrication facilities, plumbing rough-in work, and general mechanical trades where accurate layout and checking of square are routine tasks. The dual-scale graduation makes it practical in environments where drawings or specifications may reference either imperial or metric dimensions. Installers and journeymen working with sheet metal, structural steel, or pipe assemblies will find the 12-inch blade length appropriate for typical component and joint layouts.

Key Features

• 12-inch hardened steel blade resists wear and maintains straight reference edge
• Cast iron square head provides stable 90-degree and 45-degree reference angles
• English and Metric dual graduation on a single blade
• Graduation increments of 0.02 inches, 0.03 inches, 0.5 inches, and 1 mm
• 2-piece set includes blade and square head for versatile layout tasks

Compatibility

Designed as a general-purpose combination square set suitable for machine shop, fabrication, and mechanical trade layout applications where a 12-inch hardened steel blade and cast iron square head are appropriate for the task.

Installation Notes

Combination squares are hand-layout and inspection tools and do not require installation in a mechanical system. Before use, verify the blade slides freely and the locking mechanism holds the head firmly at the intended position. Keep the blade clean and lightly oiled to prevent rust and maintain smooth adjustment. Store the set protected from impact to preserve blade straightness and head accuracy.