As some of you know, Dr. Hartman uses a slightly different technique to castrate male horses called the Henderson castration technique.  It involves the use of a power drill and a specialized clamp to literally twist off the testicle.  Traditional methods involve the use of an emasculator which crushes the tissue to ensure adequate termination of blood flow.   If the emasculator has been around for such a long time and works, why turn to power tools??