The Kleenex of castration tools based on the concept of simply crushing the spermatic cords so as to instantly (and quite painfully) cut off the blood supply to the testicles, much like the elastrator but much more instantaneous. It is probably less painful in the long run, and the scrotum remains intact, but it has the notable disadvantage, in the case of voluntary castration, of being irreversible once it's applied. This fact might also pose a problem to a farmer who castrates while drunk and suddenly realizes the next day that he's made his prized stud into a gelding. Oops. Also, if done incorrectly to oneself, it can cause lots of bad internal hemmoraging from the cords not being properly sealed off (the clamp apparently pinches them shut at the new ends).