Blades for bandsaws and reciprocating saws are often made with bimetal construction. Bandsaws and cold saws have mostly displaced them. Head saws are large bandsaws that make the initial cuts in a log. Runners, gates, and risers may be removed using cutting torches, bandsaws, or ceramic cutoff blades. Horizontal bandsaws hold the workpiece stationary while the blade swings down through the cut. Systems which cool the blade with cutting fluid are also common equipment on metal-cutting bandsaws. Automatic bandsaws feature preset feed rate, return, fall, part feeding, and part clamping. After the war, Plass and his father manufacturered bandsaws. Almost all bandsaws today are powered by an electric motor.