Systems and methods for securing and electrically grounding objects or payloads are provided herein. The shield may be extended out of the housing with two links and two racks and a motor. The server sends the wireless client a stub of a distributed object. An assembly of this kind allows an easy attachment and removal of an accessory such as a mixer or a closure cap and can be produced inexpensively. A plurality of counter-weights are secured to the counter-weight support plate, proximate a perimeter thereof. The LED includes: a semiconductor substrate; first and second semiconductor protrusions disposed on the semiconductor substrate to face each other; a semiconductor nanowire suspended between the first and second semiconductor protrusions; and first and second electrodes disposed on the first and second protrusions, respectively.