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The SPI 30-225-7 is a 2-piece combination square set built for layout, marking, and inspection work in mechanical and trade applications. The set includes a 12-inch hardened steel blade and a hardened steel square head. The blade is graduated in 16R style, providing readings in 1/32, 1/64, 1/50, and 1/100 inch increments. This level of graduation density suits precision layout tasks where standard rules fall short. Machinists, pipefitters, fabricators, and maintenance technicians rely on combination squares for scribing lines, checking 90-degree and 45-degree angles, and measuring depth or height with a consistent reference edge.
The 30-225-7 is suited for use in fabrication shops, machine shops, and field maintenance environments. The hardened steel construction on both the blade and head resists wear under repeated use on metal surfaces. The 12-inch blade length accommodates a wide range of layout tasks on plate, pipe, and structural stock. This set is a standard tool selection for professionals who need reliable graduation accuracy across multiple measurement systems without switching tools.
Designed as a standard 2-piece combination square set suitable for general layout and inspection tasks in machining, fabrication, and mechanical trade applications.
No power source or utility shutoff is required for use of this measuring tool. Machinists and fabricators should verify the head locks securely to the blade before scribing or transferring measurements. Keep the blade and head free of chips and debris to maintain graduation readability and square accuracy. Periodic inspection of the locking mechanism and blade edge condition is recommended to ensure measurement reliability.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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