... to eliminating some clamping, the creative use of drywall screws can many times eliminate the need for complicated, ... : Drywall Screw, Chipboard Screw, Subfloor Screws, and Decking ScrewHead Types: Bugle Head, Double Countersunk Head, CSK HeadRecess Types: Phil, Square, ... 4 )Thread: Fine or Coarse Thread.Point: Sharp Point, Self-drilling Point.Coating: Black or Gray Phosphated, Zinc Plated, Decromet, ...