Gin traps– horrible, mechanical devices, designed to grasp an animal by the leg using spring-operated metal jaws. In their desperation to escape the pain and terror of being trapped, the captured animal will sometimes bite off the limb that has been caught. The use of gin traps has been illegal in the UK since 1958 and is banned in 90 other countries around the world.
http://www.thepetitionsite.com/738/327/969/ban-leghold-traps/