A symmetric sensing coil design is proposed and adapted for the self-inductance-based metal object detection (MOD) of wireless electric vehicle (WEV) charging. Compared to conventional non-symmetric sensing coils. the proposed sensing coil provides symmetric detection sensitivity and ease of manufacturing. pertaining blind-zone-free characteristics. https://www.roneverhart.com/Modern-Rectangular-Keyed-Entry-Pocket-Door-Emtek-2113/