Hmmm. It must be pretty good...set off trap, I did not hear it snap, it got away w/o leaving any foot prints where I set trap and it left the bait. It's not the rat I just saw in the storage area under my bed or if it is I need larger trap. May be armadillo or possum or coon...hehe. Ouch!! Thump!!! That's OK. Moving up to next size trap.