We have not set a limit to the number of business pages a user (or business) can create so the answer to this question will vary by situation.
If your business offers services and products (tools) AND you want just one business page we suggest choosing the option that is the biggest area of emphasis for your business.
An alternative to this would be creating separate business pages for your services and products.
If you do create separate pages we do ask that you do not use the exact same business name for both pages. We do moderate all new pages and will make suggestions, edits or category changes if you happen to make a mistake.