4" Machinist Square

The 4 inch machinist square delivers precision for design and layout work. Crafted from hardened carbon steel with high tolerance and a ground surface and edges, this 90-degree square ensures accurate right angles every time. Built to German DIN Standard 875 Grade 1, it serves as a trusted instrument for engineers, machinists, and workshop professionals. The compact 4" (100 mm) size pairs a sturdy base thickness of 15/32" (11.86 mm) with a consistent squareness across measurement tasks, resisting wear in daily use and delivering repeatable results.

• Hardened carbon steel construction for durability
• High tolerance for dependable squareness
• Ground surfaces and edges for accurate readings
• DIN 875 Grade 1 compliant for standardization
• 4" (100 mm) size with 15/32" (11.86 mm) base

Perfect for layout, metalworking, woodworking, and design tasks that demand precise 90-degree angles. The 4 inch machinist square helps you mark, verify, and transfer lines with confidence—creating clean lines and tight fits across projects. Enhance your workflow by adding this square to your toolkit today.