Hello Vodkajonny,
I can advise that even though your scraper has 3 screw holes the spare blades listed should still hold the blade securely and safely enough to be used. If you have any further questions, or are unsure, your local Screwfix branch should be able to help you.
Thank you for using Screwfix Q&A.
Answered by: AMargetts
Date published: 2021-06-22