Starrett 56405 Combination Square Set 24 in 3 Piece

Product Description

The STARRETT 56405 is a 3-piece combination square set built around a 24-inch steel blade. The set includes both a square head and a forged steel center square head, giving technicians and tradespeople the tools to check squareness, find center lines, and measure angles in a single kit. The blade features 4R graduation, marked in 1/64, 1/32, 1/16, and 1/8 inch increments, supporting precise layout work across a range of trades. The forged steel center head adds durability for demanding job site conditions. Total package weight is 2.125 pounds.

The STARRETT 56405 is suited for layout and inspection tasks in mechanical, HVAC, plumbing, and general fabrication work. It handles common tasks such as scribing lines, checking right angles, and locating center points on round stock. The 24-inch blade length supports work on larger panels, sheet metal, ductwork, and structural components. This set is a practical choice for service technicians and installers who need a reliable multi-function layout tool on the job.

Key Features

• 3-piece set includes a 24-inch steel blade, square head, and forged steel center square head
• 4R graduation: 1/64, 1/32, 1/16, and 1/8 inch increments on a single blade
• Forged steel center square head for added strength and wear resistance
• 24-inch blade length accommodates layout work on larger workpieces
• Dual-head configuration enables squareness checks and center-finding without switching tools

Compatibility

Designed as a general-purpose combination square set suitable for layout and measurement tasks across mechanical, fabrication, and trade service applications.

Installation Notes

No power source or shutoff is required for layout tools. Store the blade in a dry location to prevent corrosion on the steel surfaces. When scribing critical reference lines, verify the head is seated firmly against the workpiece edge before marking. Handle the forged steel heads carefully to avoid damage to precision-ground mating surfaces.