Metal Improvement Company was established in 1946 in Los Angeles, CA. With 37 manufacturing operations throughout the US and Europe, EF Quality Heat Treating is the 38th manufacturing operation for the company.

Their main interest is in heat treating metal for rock drilling and underground construction.

Ernie Vowles of Metal Improvement Co. Inc. stated, "EF Quality Heat Treating has an excellent reputation in its marketplace and will be an asset to Metal Improvement Company's existing family of heat treating divisions."