Material: high impact ABS plastic (can not be used on hot engine parts) Application: for hex head nut or bolt with a 7/16" (measuring from flat side to flat side) wrench or socket, interior or exterior   Size: 7/16" inside diameter; 5/8" outside diameter, 9/32" tall Installation: push on Color: black Part Style: hex head, dome cap Quantity for sale: set of 10 caps Bulk Packaging New