Averaging about three feet, blades were pattern welded, a sophisticated technique by which twisted rods and strips of iron or steel were hammered together.
Similar to the traditional rocks, these works are constructed to hide the hand of their author, hand-hammered out of sheets of steel into exquisitely modulated surfaces.
Steel drums were made of oil drums heated and hammered into an instrument with multiple pitches played with rubber-headed mallets and were often played in bands of many instruments.