ITEM NO.: ZHSLSS-001 The unique functions introduction of Jelary locks 1.Jelary locks have been honored 16patents and filled the empty of calling in home of abroad .We have obtained ISO9001 Quality Certification and certificate of qualification from Shang hai Lock Inspection center which is the authority in calling. 2.we have introduced advanced technology 4-layer plating.The color 24K golden plating surface is magnificent.All kinds of the surface technology adds to more than 10.whats more,we have used the E-swimming technology of Japanese OFT,It has the characteristic of high transparency and smooth level,anti-color changing,anti-septic weather resisting,the checking count of hardness has reached 4H and the mesh-adhesive strength has reached 100/100. 3.It can work without the keys, when you would be out ,you just need to press the function knob and drag the handle twice,then the door is locked. 4.It has the function of in-door inverse locking .You just need to revolve the lock-head to 45° and pull the safe knob out ,then any key doesnt work. 5.The lock-body is seal off to prevent from wood-flour falling into it, when its installed.And the body is super-thin,all of the parts have been heattreatment.So the hardness has reach HRC49-51.All of the secrews are made of stainless steel. 6.The surface board,lock-body,lock-head and handle are all made of brass,and we have introduced the advanced production line,no parts are made in else factory 7.We have good sale-service.if you would have the quality question ,we would change of repair it for you free in charge.