EL-130NO/NC is designed for wooden door, metal door, PVC door and so on. The products of our company are various and full-equipped. The operating principle of electric strike is that the electric power turns into magnetic force. Electric strike has two working modes: one of the mode is door locked when power off. The another modes is door locked when power on. An electric strike is an access control device used for doors. EL-131NO/NC type is with short faceplate. Electric strikes are generally available in two modes: Fail-secure: with current to the strike will cause it to unlock. Fail-safe: with current to the strike will cause it to lock. Electric strikes come in many varieties. EL-132NO/NC is the electric strike with long faceplate. It has two modes: A fail safe electric strike needs power to keep it locked. A fail secure electric strike stays locked even without power.