Spi 13-376-9 Combination Square Set 12 Inches 4 Piece

Product Description

The SPI 13-376-9 is a 4-piece combination square set built for layout, inspection, and measurement work across trade and industrial applications. The set includes a 12-inch hardened steel blade graduated in both English and metric units, along with three interchangeable heads: a square head, a center head, and a protractor head. Graduation increments of 0.02 inch, 0.03 inch, 0.5 inch, and 1 mm give technicians precise reference points for scribing, angle setting, and center finding. The hardened steel construction on both the blade and heads resists wear during repeated use in shop and field conditions.

This combination square set suits machinists, pipefitters, fabricators, and general tradespeople who need a versatile layout tool. The 12-inch blade length handles standard stock and structural work. The interchangeable head system — square, center, and protractor — covers the most common measurement and marking tasks without switching to multiple separate tools. The English and metric dual graduation makes it practical for work that references either measurement standard.

Key Features

• 12-inch hardened steel blade with English and metric dual graduation
• Three head types included: square head, center head, and protractor head
• Graduation increments: 0.02 inch, 0.03 inch, 0.5 inch, and 1 mm
• Hardened steel blade and head construction for durability and wear resistance
• 4-piece set covers layout, angle measurement, and center-finding tasks

Compatibility

Designed as a general-purpose combination square set suitable for use in machine shop, fabrication, and field layout applications where a 12-inch blade with interchangeable heads is required.

Installation Notes

No installation is required for this hand tool. Before use, inspect the blade lock mechanism on each head to confirm the blade is fully secured before scribing or measuring. Keep the blade and head contact surfaces clean and free of debris to maintain measurement accuracy. Store the set in a dry location to prevent corrosion on the hardened steel components.