Spi 13-266-2 Combination Square Set 12 Inches 3 Piece

Product Description

The SPI 13-266-2 is a 3-piece combination square set designed for precision layout, measurement, and inspection work across fabrication, machining, and general trade applications. The set includes a 12-inch hardened steel blade and two interchangeable heads: a standard square head and a center square head, both cast from iron for rigidity and durability. Blade graduations follow the 16R scale, providing readings in 1/100, 1/32, 1/50, and 1/64 inch increments. This level of graduation density supports detailed scribing, depth checking, and angle verification on metal, wood, and composite materials. The set weighs 3.5 pounds and is packaged as a single unit.

This combination square set is suited for use in machine shops, metal fabrication facilities, carpentry operations, and general maintenance environments. The square head allows 90-degree and 45-degree reference work, while the center square head locates the center of round stock quickly and accurately. Machinists, toolmakers, millwrights, and skilled tradespeople working with layout-intensive tasks will find the dual-head configuration practical for reducing the number of individual tools required on the bench or in the field.

Key Features

• 12-inch hardened steel blade resists wear and maintains graduation accuracy over time
• 16R graduation style provides 1/100, 1/32, 1/50, and 1/64 inch increments on a single blade
• Cast iron square head and center square head included for versatile layout work
• Center square head locates center points on cylindrical or round stock
• 3-piece set reduces the need for separate tools during layout and inspection tasks
• Compact package weight of 3.5 pounds for practical bench or toolbox storage

Compatibility

Designed as a general-purpose combination square set compatible with standard 12-inch combination square blade systems. The interchangeable head design is suitable for typical layout and inspection workflows across machining, fabrication, and carpentry trades.

Installation Notes

No installation is required for this hand tool. Before use, verify that blade graduations are clean and legible and that head locking mechanisms are fully tightened to prevent movement during measurement. When scribing or transferring measurements on metal surfaces, ensure the workpiece is secure and free of burrs that could affect blade seating. Inspect the heads and blade for damage before use in precision applications.