SPAX combines a fully-threaded shank (for most versions) with a patented serration 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 better than 24 gauge. SPAX have the German building code approval.
|Product Group||Screws & Fasteners|
|Category||Panel Attachment, Wood Screws, General Purpose|
|Sub-Category||Panel Attachment, Wood, General Purpose|
|RECESS||Combo - Square/Phillips|
|POINT TYPE||Self Drilling Squared Tip|
|DRIVER BIT SIZE||#2|
|Unthreaded Shank Diameter||No|