Zinc Flat Head, Combo drive, Coarse Thread, Type 17 Auger Point Self Counter Sinking Screw #8 x 1-1/4", box of 1000 Zinc Color Flat head with 4 nibs for self counter sinking Coarse thread for greater holding power & faster driving Type 17 auger point for quicker penetration Smooth shank for better draw and tighter seating