This is the best tool I’ve used, and the carbide index blades seemingly last forever. Added bonus is that the shape fits my hand so well I can use it for long periods of time without fatigue.
Originally found it on the expensive tool truck, then researched to see who made it for them (at 1/3 the cost).
Bahco 625 Premium Ergonomic Carbide Scraper, 1", with Plastic Holder,Black
https://www.amazon.com/dp/B000288LOW...6456JXKS?psc=1