Spi 13-350-4 Combination Square Set 6 in 2 Piece

Product Description

The SPI 13-350-4 is a 2-piece combination square set built for layout, scribing, and angle verification on the job. The set includes a 6-inch hardened steel blade and a hardened steel square head. Graduation follows the 4R pattern, providing four reading scales: 1/16, 1/32, 1/64, and 1/8 inch. The hardened steel construction on both the blade and head resists wear under repeated use in shop and field environments. Installers in HVAC, plumbing, electrical, and mechanical trades rely on combination squares for accurate measurement and marking during rough-in and finish work.

This combination square set suits residential and light commercial trade applications where precise layout work is required. Common uses include marking cut lines on conduit, pipe, duct, and sheet metal, as well as checking squareness on brackets, panels, and enclosures. The 6-inch blade length is well suited for confined spaces and bench work. The 4R graduation style provides fine measurement resolution down to 1/64 inch, making it appropriate for detail layout tasks that demand accuracy beyond a standard tape measure.

Key Features

• 6-inch hardened steel blade for durability and long-term accuracy
• Hardened steel square head resists deformation under jobsite conditions
• 4R graduation: 1/64, 1/32, 1/16, and 1/8 inch scales on a single blade
• 2-piece set includes blade and square head
• Compact 6-inch size works well in tight spaces and bench applications

Compatibility

Designed as a general-purpose combination square set suitable for use across HVAC, plumbing, electrical, and mechanical trade layout tasks.

Installation Notes

No power-down procedure is required for layout tools. Keep the blade locking mechanism free of debris to maintain accurate head positioning. Periodically check the square head for squareness against a known reference surface to confirm ongoing accuracy. Store the set in a dry location to prevent corrosion on the hardened steel components.