They don’t leave a “mound” when you drive them in flush. The composite decking stays flat.I purchased two Camo hidden fastner tool in july along with 1750 bucket of screws I finally got permits issued last month so i started job ,Well guess what they make two differtent screws and the ones i got dont fit the Camo tool. I would like to know why when i was buying tool and also screws that they would have some kind of sticker on letting you know they do not fit the tool. Now i am stuck with $100 worth of screws that dont work in my tool