4 in x 1/4 in x 1/4 in
Standard Abrasives S/C Unitized Wheel 853254, 532 4 in x 1/4 in x (Case of 10)
You will find that Ford uses standard fasteners for easy repairs.
Standard Abrasives S/C Unitized Wheel 863254, 632 4 in x 1/4 in x (Case of 10)
A nice touch from BSTFLEX is the clear instructions that come with it.