Electric locks smart lock pads

Smart lock pad

— this type is installed over the existing lock, specifically on the cylinder part, and is not connected to the handle: in essence, it mechanically rotates the "core" from the inside after authorization, leaving your handle and the door's appearance almost unchanged. This is a popular form factor for upgrades because it doesn't require changing the entire lock and is often installed without complex work, especially if it's important to preserve the exterior cylinder and keys as a backup. Compared to a smart handle, this overlay specifically addresses the locking/unlocking function of the lock, not just the handle locking, so it is better suited for entrance doors. An example of use is a quick "smart" upgrade of an apartment door when you want to open it with a smartphone or code but keep the familiar hardware.