SteelSeries Cord Holder (60001) 

Having the mouse attached to a computer (which is normally placed below the desk) can cause a problem for gamers. If the mouse isn't cordless it can be impossible to keep the cord on the table, resulting in a drag (and added resistance) when using the mouse. This affects aim, directly impacting on accuracy and precision, resulting in lower in-game performance.
With the SteelSeries Cord Holder you are completely sure that you are running the mouse and not the cord. Simply place the cord in the hatch and fasten the screw until you are sure the cord can't slip - and experience the full potential of your mouse and mouse pad.