Keyed alike entry lock - Combo lockset.Ball-style knobs with the same key.Lock/Unlock by the same key(Inconsistent keys for different sets of door knobs).Convenient to take one key for several doors.5 knobs with 15 same keys. Entry Door Knobs - Can Lock outside with the key and lock inside by the turn button. Best use for Exterior Door/Front Door, Commercial/ Residential, offers convenience and enhanced security for you and your family. Adjustable Design - Adjustable latch fit 2-3/8"or 2-3/4"(60mm-70mm) back sets.The lock set fits 1-3/8" to 1-3/4" thickness doors. For right-handed and left-handed doors. Easy Installation - Easy Replacement Installation with Phillips Screwdriver,No need for professional door fitters, you can complete the installation of the door knob by yourself. Haidms Service - Please check these parts before installation. If there is any quality problem with your purchasing, please get in touch with us. We're confident you 'll love you