ESSVE terrace board screws are designed for railings, wooden decking materials, etc. c. for mounting on a wooden frame outdoors. In difficult places, such as seaside or pool areas, etc., it is always recommended to use stainless steel terrace board bolts. c., it is recommended to always use stainless steel terrace board screws, pre-drilled. Screws made of hardened steel, with CorrSeal coating. There is a fiber cutter at the end of the screw. This ensures very low screw-in torque and reduces cracking. The screw head has 4 cutting grooves for more convenient immersion of the conical base, no rough surface is formed. TX nozzle, TX20.