Brass Square, half hard temper, aka free machining brass square is is a soft, ductile metal that machines quite easily with a machinability rating of 100%. Brass Square is ideally suited for applications where strength, good corrosion resistance, electrical conductivity, and non-sparking characteristics are important. Used widely for decorative purposes because of its smooth, shiny gold-like appearance, brass squares are relatively easy to polish to a desired luster with minimal effort.