On the underside of their bugle heads are ridges that cut a nice, neat countersink. ... Spax and GRK screws usually come packaged with a Torx T20 or T25 bit.

The screw has what is referred to as a “bugle head.” It’s meant to pull down into the paper surface of drywall without puncturing it, but can also pull down neatly into softwood lumber.

The screw has what is referred to as a “bugle head.” It’s meant to pull down into the paper surface of drywall without puncturing it, but can also pull down neatly into softwood lumber.