Wood screws are designed to efficiently join two pieces of wood together. It is the best alternative to nails for holding power and where possible future disassembly is required. Wood screws cut its own thread in wood and can sometimes be installed without pre-drilling. Steel wood screws with lengths up to 1 are fully threaded and can be substituted for metal screws. Available in flat head square drive and round head square/slot combination drive. Zinc-plating provides moderate corrosion resistance. Recommended for interior use. Also available in brass for a decorative appeal and stainless steel for exterior applications where corrosion resistance is required