Tornado Ribs:

*Keep the object surface free of tailings around the edges of the screw head

*No splits on the surface close to the edge of object

*Keep the object surface flat and smooth

*Worldwide patents protection

Torpedo Pre-milling Thread:

*Fast grip onto soft/hard wood

*No splits even close to the edge of soft/hard wood

*Low driving torque for fast driving on soft/hard wood

*High ductility (Bending angle >30°) by special quenching and tempering

*High and safe pull-out value for security purpose

*Worldwide patents protection

If you have any demand, welcome to send an inquiry to us.