Length of Screw Does NOT Represent the Usable Length of Thread / Thickness of Wood - See Graphic Reference Important Notice Before Installing - NOT For Welded Seams or Tempered Metal Reamer Tek Screws are for Applications where Wood is Being Fastened to Mild Steel or Aluminum Maximum Wood depth ~1-1/2" - Maximum Metal Thickness Screw Can Bore ~1/4" - Use T-30 Torx/Star Bit Dimensions: Head Width .461" - Total Length 2-3/4" - Shank Diameter .24" - Torx /Star Bit Not included