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Superior Precision Product Offerings


Rock of Ages Precision Granite Products has one of the longest histories in the United States in the manufacture of granite surface plates and metrology components.  Our experience has made our products some of the best in the industry.  We manufacture a considerable number of medium to very large-sized surface plates for special applications, up to 50 feet in length.

our principal product lines

We also offer standard or custom metrology components, such as:

  • Master Squares
  • Master Angles
  • Parallels
  • Straight Edges

If your surface requires mounting points, Rock of Ages can provide threaded inserts on position, dovetails in the granite, or inserted steel bars with T-slots. 

Quality & Accuracy

Feel confident in your decision to use Rock of Ages knowing our surface plates meet or exceed Federal Specification GGG-P-463c and that all standard metrology products are supplied with a NIST traceable calibration certificate with your purchase, at no additional cost.