Fastap No. 8 x 1-1/4 in. L Square Countersink Head Stainless Steel Stainless Steel Wood Screws

excellent product.

Inconceivably small screws, if you would like to use them for anything outside don't, just get a longer screw.

Small chamfers in the underside of the drive head help to seat this screw in cement board easier than "typical" cement board fasteners.