Spi 13-971-7 Combination Square Set 4 Inch Stainless

Product Description

The SPI 13-971-7 is a 4-inch combination square set designed for layout, measurement, and angle verification tasks in trade and shop environments. The set includes a stainless steel blade with both English and metric graduations, reading to 1/32 and 1/64 inch, alongside three interchangeable heads: a square head, a center head, and a protractor head. This versatility makes it a compact, multi-function precision tool used by pipefitters, electricians, machinists, and general tradespeople who need accurate scribing and angle measurement in tight spaces. The blade measures 4 inches in length and 3/4 inch in width.

This combination square set suits layout work across residential and commercial trade applications. The square head handles 45-degree and 90-degree angle checks, the center head locates the center of round stock, and the protractor head reads angles for custom cuts and fit-up work. It is well suited for conduit layout, pipe fitting, carpentry trim work, metal fabrication, and any application where repeatable, precise measurements are needed in a compact format.

Key Features

• 4-inch stainless steel blade with 3/4-inch width for compact layout work
• English and metric dual graduation to 1/32 and 1/64 inch resolution
• Three-head set: square head, center head, and protractor head included
• Stainless steel blade and head construction for corrosion resistance and durability
• Interchangeable heads for versatile use across multiple measurement tasks

Compatibility

Designed as a standard 4-inch combination square set suitable for general trade layout and measurement applications.

Installation Notes

No installation is required for hand tools of this type. Before use, verify that the blade locks securely in the head and that the reference edge is clean and free of burrs. Store in a dry location to maintain blade and head accuracy over time. Periodic inspection of the locking mechanism ensures consistent measurement results.