COE specializes in the unique "Hindrance-free" doorknobdesign, which allows in and out of the house withouthindrance, and the innovative "Tamper-resistant" lockmechanism which provides a protection and high-securitysystem. Both these systems are consistently proving tocommercial and residential end-users throughout the worldthat these innovative, patent and specialized"Hindrance-free" and "Tamper-resistant" systems haveconsiderably more advantages than other less efficienttraditional methods.No more embarrassing moment and curses galore in findingthe door is closed when your hands are both full. You haveonly to touch and push the handle lightly with any part ofyour body and there you go - the door is opened! So simple,so easy. A midas' touch, what else?1. Unique "Tamper-and pick-resistant" brass mushroom pinsproduce safety in use.2. Innovative "revolving, conical rose plate offers nopurchase on it for any wrench or plier.3. New plug-in type screw socket design to facilitate andexpedite installation of lock unit.4. Titanic gold or chrome plated, or polished stainlesssteel.Versatility of "Hindrance-free" doorknob applications1. Fir escapes2. Emergency exits3. Kitchen doors4. Convenience stores5. Public buildings6. Theaters7. Green houses8. Laboratories9. Workshops, etc. ... 
Taiwan