Starrett 50051 Combination Square Set 6 Inch 2 Piece

Product Description

The STARRETT 50051 is a 2-piece combination square set built for precision layout and measurement work in the trades. The set includes a 6-inch hardened steel blade paired with a cast iron square head, offering reliable right-angle and 45-degree reference in a compact format. The blade is graduated in the 4R style, providing four graduation scales: 1/64 inch, 1/32 inch, 1/16 inch, and 1/8 inch on a single blade. This tool is suited for sheet metal work, pipefitting, electrical rough-in, and any application where accurate scribing, depth measurement, or squaring is required on the job or at the bench.

The STARRETT 50051 is used across residential and commercial trade work wherever layout precision matters. HVAC fabricators use it for duct layout and sheet metal scribe lines. Electricians and plumbers reach for it during rough-in to verify square cuts and consistent offsets. The compact 6-inch blade length makes it practical in tight spaces and for checking shorter stock. The cast iron square head locks onto the blade securely, allowing the blade to slide and lock at any position for depth or step measurements.

Key Features

• 6-inch hardened steel blade resists wear and maintains graduation accuracy over time
• 4R graduation style: four scales in 1/64 inch, 1/32 inch, 1/16 inch, and 1/8 inch increments
• Cast iron square head provides stable, durable right-angle reference
• Blade slides and locks along the head for adjustable depth and step measurements
• 2-piece set includes blade and square head ready for immediate use
• Lightweight at 0.438 pounds, suitable for carrying in a tool pouch or bag

Compatibility

Designed as a standard 6-inch combination square set compatible with general layout and measurement tasks across HVAC, plumbing, electrical, and sheet metal trades. No specific system or equipment compatibility is required for this hand tool.

Installation Notes

No power source or shutoff is required for this hand tool. Ensure the blade lock nut is tightened securely before scribing or transferring measurements to avoid blade shift. Periodically clean the blade channel and head slot to prevent debris from affecting blade travel or seating accuracy. Handle the cast iron head with care to avoid impact damage, as cast iron is rigid but brittle under shock loads.