Starrett 56367 Combination Square Set 12 in 3 Piece

Product Description

The STARRETT 56367 is a 3-piece combination square set built for layout, inspection, and scribing work in fabrication, HVAC, plumbing, and electrical trades. The set includes a 12-inch hardened steel blade and two heads: a square head and a center square head, both cast from iron for rigidity and durability. The blade is graduated in the 4R style, providing four scales: 1/64, 1/32, 1/16, and 1/8 inch markings on a single blade. Metric equivalents run at 0.02, 0.03, 0.06, and 0.13 inch increments. This tool is suited for professionals who need reliable layout references directly on the job site or in the shop.

The 56367 is used wherever accurate right-angle and center-finding layout is required. The square head locks to the blade at any position along its 12-inch length, allowing depth and shoulder measurements as well as 90-degree and 45-degree reference checks. The center square head finds the center of round stock quickly, a common task when laying out pipe flanges, drilling center marks on round bar, or aligning cylindrical components. This set suits HVAC sheet metal work, pipefitting layout, electrical conduit bending setup, and general mechanical trades.

Key Features

• 3-piece set includes 12-inch steel blade, square head, and center square head
• 4R graduation style: 1/64, 1/32, 1/16, and 1/8 inch scales on one blade
• Cast iron heads for dimensional stability and resistance to wear
• Center square head locates center on round or cylindrical stock
• Blade slides and locks along full 12-inch length for flexible measurement setups

Compatibility

Designed as a standard 12-inch combination square set suitable for general layout and inspection use across mechanical, fabrication, and trade service applications.

Installation Notes

Combination squares are hand tools requiring no power-down procedure, but blade edges are sharp and should be handled with care to avoid injury. Before use, verify the blade lock screw seats firmly to prevent movement during measurement. Periodically check the head faces against a known reference square to confirm accuracy has not drifted from impact or wear. Store the set protected from moisture to prevent rust on the steel blade.