Spi 13-256-3 Combination Square Set 18 Inches 2 Piece

Product Description

The SPI 13-256-3 is a 2-piece combination square set built for layout, inspection, and measurement work in trade and industrial settings. The set includes an 18-inch hardened steel blade and a cast iron center square head. The blade is graduated in the 4R style, providing four graduation increments: 1/64, 1/32, 1/16, and 1/8 inch. That range of increments supports both rough layout and close-tolerance measurement in a single tool. Machinists, pipefitters, fabricators, and tool-room technicians are the primary users of this type of set.

This combination square set is suited for use in fabrication shops, machine shops, and on-site mechanical work where accurate 90-degree and 45-degree reference, depth measurement, and scribing are needed. The center square head allows the user to find the center of round or square stock quickly. The square head provides a reliable right-angle reference for layout on flat stock or structural material. Both heads accept the same 18-inch blade.

Key Features

• 18-inch hardened steel blade resists wear and maintains graduation accuracy over repeated use
• 4R graduation style: 1/64, 1/32, 1/16, and 1/8 inch increments on a single blade
• Cast iron center square head for locating centers on round or square stock
• Square head included for 90-degree and 45-degree layout and depth measurement
• 2-piece set provides versatility for multiple layout tasks without switching tools

Compatibility

Designed as a standard combination square set with an 18-inch blade and interchangeable heads. Compatible with other standard combination square accessories that accept an 18-inch blade with 4R graduation.

Installation Notes

No power source or mechanical installation is required for this hand tool. Inspect the blade and head locking mechanism before use to confirm secure seating. Keep the blade and heads clean and free of chips or debris to maintain accurate seating and readings. Store in a protective case or tool roll to prevent blade damage and graduation wear.