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instrument for simultaneous crushing and cutting of exposed spermatic cord in open castration. Cutting the cord is simple, crushing the vessels so that hemorrhage is avoided in a mature stallion is much more difficult. Crushing is effected by having one or a series of opposing ridged surfaces on the horse side of the cutting edge. Complexity of crushing apparatus varies from a single crushing face, e.g. the Frank emasculator, to a multiple with ratchet handle so that the apparatus can be left in place for a short time, e.g. the reimer emasculator.