Spi 13-273-8 Combination Square Set 24 Inches 3 Piece

Product Description

The SPI 13-273-8 is a 3-piece combination square set built around a 24-inch hardened steel blade. The set includes both a square head and a center head, giving technicians and tradespeople a versatile layout and inspection tool in a single kit. The blade is graduated in English and metric units, with 1/32-inch and 1/64-inch increments on the English scale and 0.5 mm and 1.0 mm increments on the metric scale. The cast iron heads resist wear and hold their set positions reliably under shop conditions. This set suits precision layout, right-angle transfer, and center-finding work across a range of trade and light industrial applications.

The 13-273-8 is used wherever accurate layout and measurement are required before cutting, drilling, or fitting. The 24-inch blade length makes it well-suited for larger workpieces encountered in HVAC ductwork fabrication, mechanical piping layout, electrical panel work, and general sheet metal or structural tasks. The dual-graduation blade supports both English and metric drawings without swapping tools. The center head allows quick location of the center point on round or square stock, which is common in pipe and conduit work.

Key Features

• 3-piece set includes square head and center head with a single 24-inch blade
• Hardened steel blade resists deflection and surface wear
• Cast iron heads provide stable, repeatable locking on the blade
• Dual English and metric graduation: 1/32-inch, 1/64-inch, 0.5 mm, and 1.0 mm increments
• 24-inch blade length accommodates larger layout tasks beyond the range of standard 12-inch sets
• Center head enables accurate center-finding on round and square stock

Compatibility

Designed as a general-purpose combination square set for trade and industrial layout applications requiring English and metric graduation on a 24-inch hardened steel blade.

Installation Notes

No power source or mechanical installation is required for this tool. Before use, verify the blade is fully seated and the locking nut on each head is tightened securely to prevent slippage during measurement. Inspect the blade and heads periodically for burrs or debris that could affect accuracy. Store the set in a dry environment to prevent corrosion of the cast iron heads.