Starrett 56368 12 in 2 Piece Combination Square Set

Product Description

The STARRETT 56368 is a 2-piece combination square set built for precision layout and measurement work in trade and industrial applications. The set includes a 12-inch hardened steel blade and a cast iron square head, delivering the rigidity and durability required for consistent, repeatable results on the job. The blade features 16R graduation, offering four graduation increments: 1/32, 1/64, 1/100, and 1/50 inch, giving technicians and tradespeople flexible reference points for a wide range of layout tasks. At 1.25 pounds, the set is compact enough for tool bag carry while remaining solid in hand during use.

This combination square set is suited for use in fabrication shops, mechanical rooms, plumbing rough-in, electrical panel layout, and general construction trades where accurate 90-degree and 45-degree reference lines are required. It is a standard tool for HVAC installers, pipefitters, electricians, and general contractors who need reliable scribing, depth gauging, and squaring capability on steel, pipe, conduit, and structural material. The square head locks securely on the blade for repeatable positioning across a workpiece.

Key Features

• 12-inch steel blade with 16R graduation (1/32, 1/64, 1/100, and 1/50 inch increments)
• Cast iron square head for rigidity and wear resistance
• 2-piece set — blade and square head included
• Blade slides and locks along its full length for depth and offset measurements
• Suitable for scribing, squaring, and layout on metal, wood, and pipe

Compatibility

Designed as a standard 12-inch combination square set compatible with typical replacement blades and heads in the 12-inch combination square system format.

Installation Notes

No power source or mechanical installation is required for this hand tool. Before use, inspect the blade locking mechanism to confirm it holds position without slipping under measurement pressure. When using near energized panels or live conduit, follow applicable NFPA 70E safe work practices and de-energize equipment where required. Keep the blade and head free of debris and oil buildup to maintain graduation readability and square-head seating accuracy.