Starrett 9-12-4R Combination Set 12-Inch 4R Graduation

The Starrett 9-12-4R Combination Set is a professional-grade, 12-inch measuring and layout tool engineered for precision work in machining, woodworking, metalworking, and general fabrication. Built to the exacting standards Starrett has maintained for over a century, this combination set delivers reliable accuracy for scribing, measuring, squaring, leveling, and finding centers.

Key Features:

• 12-inch hardened steel blade with 4R graduations (1/8", 1/16", 1/32", and 1/64" increments on both sides)
• Square head with a precision-ground 90° face for accurate squaring and layout work
• Built-in spirit level in the square head for horizontal and vertical leveling
• Scriber included for accurate line marking directly from the blade
• Center head included for locating the center of round or square stock
• Satin chrome blade finish reduces glare and improves readability
• Blade slides and locks securely in any position along the head
• Manufactured in the USA to strict tolerances

The 4R graduation pattern (also known as a four-way rule) provides four different scales — 8ths, 16ths, 32nds, and 64ths — making this combination set highly versatile for a wide range of measuring tasks. The square head, center head, and scriber combine with the 12-inch rule to form a complete layout and inspection toolkit trusted by machinists, toolmakers, and craftsmen worldwide.