Referred to as the "multi-material construction screw", SPAX ® screws can be used in concrete, sheet metal, drywall, particle board, cement board, and even plastic materials. These patented screws have a phillips/square combination drive for excellent torque, and are available in 18-8 Stainless Steel for excellent corrosion resistance. No pre-drilling is required in most materials. The 4CUT point and serrated thread eliminates the need to pre-drill unless you are going into masonry or sheet metal greater than 24 gauge. SPAX ® screws are an instant solution for almost any construction project.