The silicon bronze metal is what makes the key hole cover different. The alloy is meant to add strength and an enchanting effect to the hardware piece. The cover looks like an old world plate or wall which is holding a secret. The name of the cover means a gadget which serves a particular ease of access. The patina shown in the display is distressed rust patina which can be availed in other hues. The dark hues make it a perfect fit for thematic decors and stylish doors.