Garrett | 6.5" x 9" Search Coil Cover for ACE Series | LMS Metal DetectingGarrett 6. 5" x 9" Search Coil Cover for ACE Series A search coil cover is also known as a skid plate. Detectorists use it to protect the search coil from scuffs and scratches which would occur no matter how careful you tried to be. Stones, pieces of metal, and other objects can easily cause damage to the search coil which is often quite delicate. A coil cover will reduce the potential damage while also making sure it does not interfere with the coils