PROBLEM: AN ADULT SON WHO LOOSES KEYS ALL THE TIME: SOLUTION: THE 909 SMART CODE DEADBOLT. INFACT WE BOUGHT TWO, ONE FOR THE SECURITY DOOR & FRONT DOOR. WE HAD THEM FOR ABOUT A YEAR. ABSOUTELY LOVE THEM GREAT PRODUCT EASY TO INSTALL. VERY CONVENIENT EVERYONE HAS THEIR OWN CODE. CODES CAN BE CHANGED ANYTIME WOULD HIGHLY RECOMMEND THIS PRODUCT. IT MAKES YOU FEEL MORE SECURE. WORTH THE COST & STYLISH TOO! MATCHES ANY DECOR. NO MORE: DID WE LOCK THE FRONT DOOR? IT IS ALWAYS AUTMATICALLY LOCKED WE LOOKED AT A COMPETTOR'S SIMILAR PRODUCT: IT WAS MORE EXPENSIVE AND WE DID NOT LIKE HOW IT WORKED. KWIKSET IS A SUPERIOR PRODUCT THIS PRODUCT WOULD ALSO BE GREAT FOR SCHOOL AGE CHILDREN. NO WORRIES IF THEY FORGOT OR LOST THEIR KEYS. PEACE OF MIND!