On a tile wet saw. It states 7"continuous Rim Diamond Blade
Abor Dia 1"

Does that mean a 5/8 abor will not fit. What exactly am I looking for.
Is the arbor adjustable. Harbor Freight $59.00

That means the saw has a 1" abor shaft. Must use blade with 1" hole in the center. Some blades are 5/8 but have 1" knock out.

Should note that blade is sold separately.

Very Good thanks for the explanation