Are they all the same or do they have different diameter center holes for the motor mount. I have an arrow shop cut off saw and I want to make sure I get the correct replacement blade thank you

Is the saw still being made? If so they may have a website that can help. You should also check the diameter of the blade. I had an issue with a larger than required blade. I had to use it without a blade guard or get a smaller blade. I opted for the correct diameter blade.

Called phone number not in service. Know correct diameter for blade. Diameter of hole to mount blade is issue