KEY LESS LOCKING DESIGN: twist to lock your deadbolt key less，It makes the deadbolt locking much easier especially for children&elderly people & hands with rambunctious toddlers or infants or occupied;This deadbolt TWISTING-to-LOCK key less mechanical technology is the greatest invention of the lock industry in this century since the bolt locking key less design invented in 1919;

WORK AS CHILD SAFETY LOCK: An invented DEAD-BUTTON control the bolt to maintain the door locked status as well as the opened status as You Want, just push down DEAD-BUTTON which on the interior knob to lock it with your finger while you’re holding the solidly and fullness knob;No need an extra child safety lock which drilling more screw-holes or leaving glues on your door;

BEST QUALITY and SUPER RELIABLE: Never fades & rusts and hardly wears out by the process is lathe after 304 stainless steel casting built like a tank, And with built in high quality bearing to ensure smooth turning,never worry about being cracked by burglar and no low battery issues; And lathe finish with no painting no e-plating no oil no baking varnish not like Zinc Alloy and lathe is more environmental for easy recycled use.

AMAZING DESIGN AND WORKMANSHIP : You will feel like you are plucking a string with the knob built-in bearing and the door will be locked with a clear and melodious sound when you are twisting the knob; Round, groove and cutting edge design looks more luxury, Higher-grade, more beautiful and more fashionable. Special surface finish technology makes the touching feeling of the lock delicate and smooth as silk.

EASIER INSTALLATION: This deadbolt lock can be installed by a 7-year-old child and only need a screwdriver. Easier than ordinary mechanical deadbolt lock.