STAINLESS STEEL MATERIAL: 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. ANTI-CORROSION AND DURABLE: This digital door lock adopts high-quality iron, Iron wire drawing process, lock body surface anti-corrosion, which is durable and beautiful. METHOD: 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, electronic-control, key-turning manual unlocking, after-locking, prevention no-key-unlock and after-closing door prevention disassembling lock indoors. EASY TO INSTALL: It is small and exquisite easy to install. Safe and stable, the lock body is made of metal material, hard and durable, this product is suitable for price, exquisite and easy to operate, and its durability is very considerable, it will not be easily damaged, the opportunity cannot be lost, quickly take it away AFTER-SALES SERVICE: Your feedback is very important for our business's development .We greatly appreciate your 5 Stars Positive Feedback if you are satisfied with our product and service., Weight: 1.7857443222 Pounds, Manufacturer: Sonew