Abstract: A rotatory sander pad includes a rigid inner portion for attaching to a rotary sander tool and a flexible outer portion for accepting an abrasive medium. The flexible outer portion includes a substantially flat bottom surface for accepting the abrasive medium, a through-hole substantially in its center, and a multi-dimensional upper surface that includes air flow channels disposed between the through-hole and a vertically oriented wall that direct air from below the substantially flat bottom surface through the through-hole and away from the abrasive medium.

Abstract: A wireless home security system comprising a camera sized to fit through a conventional door peephole, a camera lens attached to the camera to facilitate capturing an image of the camera field of view, a wi-fi facility for transferring the image to a remote device, and a motion sensor disposed in close proximity to the camera lens for activating the camera and the wi-fi facility in response to detecting a visitor in the camera field of view.