Cutting blade: The large cutting blade provides for screw's drilling faster.
Notch on thread helps thread lighter drilling.
Drilling capacity: better than other products with drilling capacity up to 15 mm thickness beam steel.
Tốc độ khoan: 1.600 – 1.800 RPM.
Finish: KOKEN self-drilling screws apply Hi-tech coating technology, tested according to Australian standard AS3566.2 and DIN 50018 for corossion effectiveness better orther traditional silver coating screws.