SPAX combines a patented serration thread pattern, a patented head style called the MULTIhead, which countersinks the head flush with most materials, and a patented point called the 4CUT™ which eliminates pre-drilling and splitting because of its square end which divides wood fibers.
That combination of the 4CUT™ point and serrated thread is effective enough to eliminate pre-drilling unless you're driving into either masonry or sheet metal greater than 24 gauge.
|Product Group||Screws & Fasteners|
|RECESS||Torx / Star|
|DRIVER BIT SIZE||T20|
|Unthreaded Shank Diameter||N/A|