Brown coated decking screw 4.2x55 T20

Hobau+ Torx drive. Zinc flake coating.
Thanks to the TX recess, the driving force is directed into turning the screw and fastening the materials, eliminating tip slippage in the screw recess. The head shape is the same as in Hobau screws: small diameter, with countersinking nibs on the head. Thanks to these features, no separate countersinking is needed, and the screw can be driven into harder materials in a single operation.
Ruspert coating.
Improves the screw’s corrosion resistance, but above all reduces friction, which in stainless materials can be up to 14 times higher than in normal steel. Low friction ensures that the screw drives into place without breaking or bouncing out, and the driving force is directed to fastening the material instead of merely overcoming friction.