A2 Stainless Steel Wood Screws with Torx or Star Drive Double Countersunk Screws available in extra long lengths. Torx TX20.
A4 available for marine environments. Double countersunk Heads For extra strength and sharp points to eliminate pre drilling even in most hardwoods. Ribs under head on 6mm x 140mm and above, on 8mm and 10mm Diameter. Reinforced double countersunk Head European technical approval ETA 11/0283 (Diameter 3,0 and 3,5 not component in the approval)
Stainles Steel A4 316 marine grade wood screws with a double countersunk reinforced head.
Available with plain head and sharp point or Ribbed head and cutting tip.