China Company Headquarters: Linyi Ruili Hardware Co., Ltd.  
ADD：The Zhimadun Industrial Zone, The Economic and Technological Development Zone, Linyi City, Shandong, China 
TEL：0539-8379100  8806128 13406849869
FAX：0539-8896128
E_MAIL：ruilihardware@chinadoorlock.com
skype：ruilihardware
QQ：438102715
QQ：1349027008

U.S. Corporate Headquarters: GLOBAL INTELOK INC
ADD： 2731E Regal Park Drive Anaheim, CA 92806,USA
TEL： 0017146305588
FAX：0017146305578
WEB：www.doublehillusa.com