• Triple layer ACQ compatible bronze coating for exterior or interior use
• Built-in washer head for increased pull through strength 
• Type 17 tip for faster precise starts which eliminate “walking”
• Under-head cutting nibs to aid in self countersinking
• Aggressive knurl enlarges hole to reduce splitting and drag to help draw
  lumber together
• V-Cut notches on threads to cut fibers for easier insertion at lower torque
• Structural Lag Screw backed by certified independent testing (TER 1907-01) (Acceptable alternative to galvanized lag screws)
• International Building Code and International Residential Code Compliant

          #15 use T-30 driver bit - see below