Starrett CB36-4R Satin Chrome Combination Square Replacement Blade Graduation - 36-Inch 4R

The Starrett CB36-4R is a precision 36-inch replacement blade designed for use with Starrett combination squares, combination sets, and bevel protractors. Crafted from hardened steel with a satin chrome finish, this blade delivers reduced glare and long-lasting durability in demanding shop environments.

Featuring 4R graduation, the blade is divided into 8ths, 16ths, Quick Reading 32nds, and 64ths of an inch — giving machinists, toolmakers, carpenters, and fabricators the measurement resolution needed for precise layout and inspection work. Machine-divided, photo-engraved graduations ensure lasting clarity and readability over years of use.

Key Specifications:

• Blade Length: 36 inches
• Blade Width: 1 inch
• Blade Thickness: 3/32 inch
• Finish: Satin Chrome
• Graduation Type: 4R — 8ths, 16ths, Quick Reading 32nds, 64ths
• EDP / Catalog Number: 50097
• Made in the USA

Compatibility: This blade is compatible with any 4-inch head combination square, combination set, or bevel protractor. The 12", 18", 24", 36", and 48" sizes (as well as 300mm and 600mm metric sizes) are interchangeable across Starrett combination sets. Note: Not compatible with Starrett models 33J or 8 combination squares.

Starrett precision measuring tools meet or exceed the accuracy and performance requirements of national and international standards, and are traceable to the United States National Institute of Standards and Technology (NIST). The CB36-4R is an ideal replacement or upgrade blade for professional tradespeople in metalworking, woodworking, aerospace, and general manufacturing.