Clocking Washers.
Size 1 is 1.45" OD x 1.38" ID x .015" thick.
Size 2 is 1.31" OD x 1.25" ID x .015" thick.
Size 1 is for using between two MHSV1 parts and will rotate the pieces approximately 100 degrees.
Size 2 is for using with a blade holder and sits against the LED module.