Masonic compass - small model The Masonic compass - small model is an essential tool for precise and symbolic representation in Masonic rituals. This measuring instrument is used by Freemasons to draw circles and arcs, symbolizing unity and harmony. The virtues of the Masonic compass - small model precision in drawings strong symbolism in Masonic rituals quality craftsmanship ease of use associated astrological sign The Masonic compass - small model is often associated with the astrological sign of Libra, representing balance and justice. Freemasons use this tool to symbolize harmony and fairness in their practices.