For use with exterior entry door. Entry lever is reversible for right or left hand door swing. Grade 3 security. Door locks and unlocks with key from exterior or turn button on interior. SmartKey Security protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds. Round cornered adjustable steel latch fits both 2-3/8 In. and 2-3/4 In. backsets. Metal snap-on collar for drive in. Lifetime mechanical warranty. Limited lifetime finish warranty.