The traditional design of the snap trap has been improved in the Victor plastic pedal mouse trap by the addition of a sizable plastic trip pedal, which results in a higher catch rate.To begin setting the trap, first remove the arm bar from where it is attached to the staple.Then, move the arm bar to the rear of the trap and adjust it so that it hangs over the edge.A very little amount of bait should be applied to the pedal made of yellow plastic.