Starrett 51543 Combination Square Set 12in 4pc 16R

Product Description

The STARRETT 51543 is a 4-piece combination square set built for precision layout and measurement work in trade and industrial applications. The set includes a 12-inch steel blade graduated in 16R style, covering 1/32, 1/64, 1/100, and 1/50-inch increments to support a wide range of marking and checking tasks. The square head is cast from forged steel for durability under regular shop use. A protractor head and center head round out the set, giving the technician or mechanic multiple measurement functions from a single kit. Total weight is 2.375 pounds. This is a professional-grade layout tool suited for machinists, pipefitters, and general trade fabrication work.

The STARRETT 51543 is intended for use wherever accurate layout, angle measurement, and center-finding are required. Typical applications include pipe and structural fabrication, HVAC sheet metal layout, equipment installation, and general mechanical work. The inclusion of a protractor head makes the set useful for setting and transferring angles, while the center head simplifies locating center points on round stock. The 12-inch blade length accommodates standard layout tasks on most trade workpieces.

Key Features

• 4-piece set includes square head, protractor head, center head, and 12-inch steel blade
• 16R graduation style covers 1/32, 1/64, 1/100, and 1/50-inch increments on a single blade
• Forged steel heads provide durability and resistance to wear under regular use
• Protractor head allows direct angle setting and transfer without additional tools
• Center head locates center points on cylindrical workpieces quickly and accurately
• Compact kit weight of 2.375 pounds makes it portable for field and shop use

Compatibility

Designed as a standard 12-inch combination square set suitable for general trade layout and measurement tasks across fabrication, mechanical, and installation applications.

Installation Notes

Combination square sets are hand tools requiring no power source or fastener installation. Before use, verify the blade locks securely in the head and the reference faces are clean and free of burrs that could affect measurement accuracy. Store the set in its case when not in use to protect the blade graduation markings and head seating surfaces from damage.