Starrett 56374 Combination Square Set 24 Inch 2 Piece

Product Description

The STARRETT 56374 is a 2-piece combination square set built for layout, inspection, and measurement work in the trades. The set includes a 24-inch steel blade and a cast iron square head graduated in the 4R style, providing four graduation increments: 1/64 inch, 1/32 inch, 1/16 inch, and 1/8 inch. This level of graduation detail supports precise scribe lines, depth checks, and 90-degree reference work across a wide range of fabrication, mechanical, and construction applications. The cast iron head resists wear and holds its reference edge under repeated jobsite use. At 1.88 pounds, the set balances rigidity with manageable weight for extended layout sessions.

The STARRETT 56374 is suited for use by machinists, pipefitters, ironworkers, millwrights, and general contractors who require accurate square and depth references during layout and fitting work. The 24-inch blade length accommodates larger workpieces and longer scribe runs compared to standard 12-inch sets. It is equally at home on a fabrication bench, in a machine shop, or on a commercial construction site where consistent squareness and repeatable measurements are required.

Key Features

• 24-inch steel blade with 4R graduation (1/64, 1/32, 1/16, and 1/8 inch increments)
• Cast iron square head for durability and stable reference edge
• 2-piece set includes blade and square head
• 4R graduation style supports fine and coarse layout work from a single tool
• 1.88-pound total weight balances rigidity with ease of handling

Compatibility

Designed as a standard combination square set for general layout and inspection tasks across mechanical, fabrication, and construction trades.

Installation Notes

Combination squares require no installation but should be verified for calibration before critical layout work. Store the blade and head together to prevent nicks to the graduated edge. When used for layout scribing, ensure the workpiece surface is clean and free of burrs that could shift the head reference. No power tools or trade-specific codes apply to this hand tool.