Material: H59 Brass Color: Titanium Silver/Titanium Gold Fit Door Thickness: 35-50mm Applications: Wooden Door Features: This is a distinct functional door lock We propose compatible for kid's room/elderly room/nursing home/bathroom This is a keyless access door lock that requires only a slender steel insert on the outside to open the door when the door is locked The customary aim of designing this door lock is to prevent children/elderly/patients from accidents in the room, and outsiders can soon open the door and rescue