Positive and secure fit of the BIT and better driving, e. g. when working overhead.
Very small raised countersunk head
The very small raised countersunk head can be nicely countersunk and ensures a perfect tongue and groove connection.
SPAX typical ground serrations
Quick and secure fastening.
Precision placement allows screwing in without pre-drilling (wood-dependent). Effectively reduces splitting of the wood.
Stainless steel A2 1.4567