Heavy-duty non-rusting, jumbo size plastic box measuring 3 7/8" x 1 7/8". Our dual magnetic system is guaranteed not to fall off your car. Inside box will hold keys up to 3 1/4"(L) x 1 7/16"(Width) to 1 1/16" (width) x 7/16"(Thick).   

Please check the size before you purchase, it's designed for regular metal key 20 years ago, not for now days big chip keys or remote keys. Buy and enjoy!