Starrett 11H-12-4R 12-Inch Combination Square with Cast Iron Square Head, 4R Graduation

The Starrett 11H-12-4R is a professional-grade 12" combination square built for precision layout, scribing, and measuring across woodworking, metalworking, carpentry, and machining applications. Part of Starrett's trusted 11H Series, this 2-piece set pairs a hardened steel, photo-engraved blade with a durable cast iron square head finished in black wrinkle.

The square head features both a precision ground 90° square face and a 45° miter face, making it a highly versatile layout tool. It functions as a tri-square, miter, depth gauge, height gauge, and level all in one instrument. The built-in spirit level and integrated scriber further expand its utility on the job site or in the shop.

Key Features:

• Blade Length: 12 inches with regular finish
• Graduation Type: 4R — 8ths, 16ths, Quick Reading 32nds, and 64ths
• Blade Material: Hardened steel, machine-divided and photo-engraved for lasting legibility
• Blade Dimensions: 3/4" wide x 0.08" thick
• Head Material: Cast iron with black wrinkle finish
• Head Dimensions: 3" long x 9/16" wide
• Accuracy: ±0.0025 inches
• Reversible lock bolt for flexible blade positioning
• Integrated scriber for accurate marking
• Spirit level vial included in head
• Number of Pieces: 2 (blade + square head)
• Country of Origin: Made in USA

Starrett precision tools have been the professional standard since 1880, meeting or exceeding the accuracy requirements of national and international standards with traceability to the United States National Institute of Standards and Technology (NIST). The 11H-12-4R is the choice of toolmakers, machinists, mechanics, and carpenters who demand reliable, long-lasting precision.