Customer Reviews for Backer-On #9 x 2-1/4 in. Serrated Flat Head Star Drive Cement Board Screws (100-Pack)

Easy application for thebusage

Works well with Hardie backer board.

Easy to use. Excellent hold.

These screws are discontinued in stores. They are now packaged by the manufacturer for Durock and Hardie backer as for either product. And, they cost more as repackaged. I guess they figured out that two packages- one for each product was not cost effective. So, as a dual use product they can charge more. Probably the pencil pusher with the sharpest pencil. Are green just like H.B screws

Works as expected. Only issue is that sometimes there is a piece of metal in the drill head.

The perfect screw for installation of hardiboard

Very good ,I recommend by hm

Believe it or not, I purchased these for a friend in Ireland. He’s redoing his bathroom and wanted these. He is very satisfied with them.

Use a lot for bathroom renovations

Good in-stock and friendly people.

A little hard to get them started in cement backerboard. But other than that, they're great screws. The T25 head makes all the difference. Much better grip and less slipping than a standard Phillip's head.