keyless Twist to Lock deadbolt,quadruplets-Lock,Lathe Finish After 304 Stainless Steel Casting Front Door Lock, ,Single Cylinder and Door Knob with Keyless Locking Design (US-E1 Quadruplet-Lock-FBA)

Twist to Lock: a Mechanical Smart Deadbolt Lock This is a subversive design of deadbolt lock underlying root technology in the lock history. Traditional mechanical deadbolt lock using keys to lock the doors. Within only 0.5 second, by twisting the knob without using any key, the door was locked. Easilok was established in 2010, aiming to use latest technology to let people living more convenient. Spent more than 2 years researching, we have finally realized the breakthrough: Deadbolt, Twist to Lock. This technology can be applied to all locks in the market around the world which still require the key to lock their deadbolt lock doors. We are applying more than 10 patents in the US and 3 PCT patents, and 8 patents in china. we will expand our innovation to gain more convenience for people in their home area. Features 1. Twist to lock, keyless locking deadbolt door lock. 2. Casting stainless steel, heavy duty. 3. 6-pin pure copper 4. Machine lathe finish, instead of coating surface finish, never fade away. Specification weight: 1.45kg Materials: 304 stainless steel, pure copper Backset: 2-3/8″or 2-3/4″(60mm or 70mm). Door thickness: 1-3/8″to 1-3/4″(35mm- 45mm). Package content —1 Deadbolt lock set —5 Keys —User Manual Warranty and Support We provide lifetime mechanical warranty and friendly customer support. If there is any question or problem in using our locks, please feel free to contact us.