◎ SUITABLE FOR A VARIETY OF DOORS: This electric deadbolt NC door lock makes the door unlock until the power is cut off, adopting NC mode - (locked while supplied with power) and fail safe mode,be suitable for wooden door, glass door, metal door, fireproof door, etc. ◎ GOOD QUALITY: 100% Brand new and high quality. Built in voltage spike suppressor , safe and stable. High-quality materials, quality problems of products can be guaranteed 100%, definitely not used products. If you find problems during use, you can contact us in time. ◎ STURDY AND DURABLE: Made of high-strength aluminum lock body,stainless steel bolt,durable and compact. Aluminum is a common tool for making locks. This material is very strong, not easy to break, and has high durability. It is difficult for bad guys to break the lock. ◎ SAFER: The new structure optimization design, more stable and more secure. Ultra-low-power design,more durable and more environmentally friendly. ◎ COMPLETE SPECIFICATIONS: 500,000 times power locks durability, complete product specification, for all types of locks installed., Weight: 1.1904962148 Pounds, Manufacturer: Sonew