If "hiding" a spare under the mat no longer seems like the answer to misplaced keys, consider a lockset that responds to the touch of a number pad. Punch in a PIN and an electric motor slides open the bolt; close the door and the bolt slides back. These locksets come in both mortise and tubular styles; replacing like with like can ease installation. That said, the owner's manual, complete with minuscule illustrations of telescoping parts, may send you into the arms of a pro. Whether or not you DIY, these five considerations are key.
Shown: Boulder dead bolt and sectional trim; baldwinhardware.com
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