Customer Reviews for Backer-On #9 x 1-1/4 in. Serrated Flat Head Star Drive Cement Board Screws (750-Pack)

Used these to hang 1/4” cement board overtop our drywall for an accent wall project. Drilled into the studs, they will not work if installed just into the drywall

These are excellent screws for attaching backer board to either wood or metal studs. They seat flush and hold securely. They come with T25 bits so no need to buy separately.

Every screw is perfect. Of course when I hit a nail head underneath then the screw cannot penetrate, but that was rare. This screw made the entire backer board project ALMOST fun! The tip easily penetrates, and the screw head has a digging action which makes the flush setting that-more-easier.

These screws were easy to use and work well with the Hardibacker board. They drive down into the board well making it easy to level tile without a screw sticking up proud of the surface.

These screws worked as expected. Most screw heads countersunk the first time. The screws that were still exposed above the surface were my fault for stop driving them short. When I found the exposed heads they went in deeper with a little more effort with the impact driver.

Worked just like it was recommended on video about Hardie Cement Board

Cheap and flimsy. It won’t go through and lots of energy to work with. Should have stick with GRKs. Wanted to try these but now I know what a junk they are.

Awesome screws for use with Hardy board. It cuts thru the board quick and doesn't split the material.

Excellent countersink desgin, Durable anti corosive finish, reliable star head drive tip included. My application through Hardie Panel and existing 1/2" composite exterior resulted in a solid to stud finish.I give this is a professional product my highest rating.

Excellent product. Very reliable. Years ahead of phillips head screws.

Excellent for All Cementitious board

Great Product.

Always do what they are expected to.

Yes, Really like that they alway come with the bit inside. Fresh bit with every box.

It kinda sucks you bearly get enought to 50 to 60 sqft of backer board and home depot charge for shipping from another state which did 2.5 weeks. Why did they ship it home another state?

The serrations under the head allow it to drive flush and secure.