* Double helical angled thread design allows easy and fast driving (Front thread first grabs wood surface and becomes tapper while later thread engaging) * Less driving torque required with safe holding power and without wood splitting * Ideal for working close to the edge of timber and board materials, no need to predrill * Steel and stainless steel available with high ductility * Plating & KTX-Nano Coat available * All dimensions available per customers' market demand