Black Granite Master Square 12 X 12 X 3 Inch 5 Face Tool Room Grade B With ISO 17025 Traceable Certification Ultra Stiff Vibration Dampening Pro Grade Layout Block For Precise Work Made In USA
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✔️ Single unit Master Square, 5-face layout, Grade B,.0002 in/6 in
This precision granite master square is a 12 x 12 x 3 inch five-face block designed for accurate layout tasks in machine shops and metrology labs. It calibrates X, Y, Z axes on CNC machines, milling machines, and coordinate measuring machines, and works with most gauge sets in lab environments. Made in the USA in Southern California since 1966, it features lightening holes for handling and ships in a secure wooden crate for safe transport and storage.
✅ 12"L x 12"H x 3"W five-face Master Square with one large face and four edges
✅ Fine-grained black granite for stiffness and vibration dampening
✅ Tool Room Grade B with.0002" per 6" accuracy and ISO 17025 traceability
✅ Made in USA, Southern California, ships in a secure wooden crate
✅ Used to calibrate X, Y, Z axes on CNC machines, milling machines, and CMMs; compatible with most gauge sets
💡 What is a granite master square used for in precision metrology and CNC setup? This handy tool helps keep machine geometry true and measurements reliable. - 12"L x 12"H x 3"W five-face block for alignment - ISO 17025 traceable and Grade B certification - Fine-grained granite dampens vibration for stable readings - Made in USA and shipped in a protective crate
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