The electronic control door locks are made of high quality stainless steel, having a double lock heads inside and outside. The lock body has on electric control unlocking unit a spring adjusting balance unit. Both push button and knob for unlocking are available. When installing it, you may change the direction of the oblique lach according to the door's opening direction.(inwards or outwards). This lock is of high anti theft, high safe, electronice control, key turning manual unlocking, after locking, prevention no key unlock and after closing door prevention disassembling lock indoors.