Quantity of FOUR  Drum Brake Adjusting Hole Plug Cover - NOS Quality Fitsl GM, Chevy, Chevrolet, Buick, Pontiac, Oldsmobile, Cadillac, Ford, Lincoln, Mercury, Chrysler, Dodge, Plymouth, Jeep and any drum brake system with oval adjusting holes from about 1955 on.  Fits inside brake adjustment slot and prevents dirt and grease from entering the brake drum Dimensions Are - Measured in the groove Length = .975", 31/32", 24.8 mm  Width = .318" , 21/64", 8.3 mm Thick = .125", 1/8", 3.14 mm