This round deadbolt was an easy installation cause i just replaced an older one everything was already cut out . I like this striker plate better than the one before smaller hole making it more tight when close. What i didnt like was the striker plate screws for the door they was  only 1/2 " long not what you need for security had to use old screws. It has a key alike feature in case you buy more than one deadbolt,  follow instructions.