Engineer Squares

Engineer squares from HK Calibrations are manufactured to much tighter tolerances and lack the graduations found on common squares, focusing entirely on providing a perfectly accurate 90-degree reference for precision machinery setup and inspection.

We offer professional calibration services that use high-precision surface plates and master cylinders to verify that your square meets the required Grade 0, Grade 1, or workshop standards for perpendicularity.

The "burr groove" or notch found on HK Calibrations squares allows the tool to sit perfectly flush against a workpiece, preventing tiny burrs or dust on the edge of the material from affecting the accuracy of your 90-degree measurement.

While highly accurate, engineer squares are precision instruments; HK Calibrations suggests using them primarily for inspection and machine setup, as the abrasive nature of raw steel can eventually wear down the precision-ground edges over time.

Stainless steel models provided by HK Calibrations offer superior resistance to corrosion and rust, making them ideal for technicians working in humid Australian coastal environments or facilities where tools are frequently handled.

To prevent warping or physical damage, HK Calibrations recommends storing your squares in a fitted wooden case or a dedicated foam-lined drawer, ensuring they are kept away from heavy tools that could knock them out of alignment.