This patented revolutionary designed #14 to #16 one step aligning self tapping screw that is made with a DMG85 coated 304 stainless steel. 304 stainless steel is known for it's excellent corrosion resistance, Our coating is safe for all metal finishes. It has a #14 tip to align the original #14 hole with a secondary drill bit to clean out rusted and corroded threads into a #16 for a secure hold on your existing metal. All while maintaining the integrity and strengthening the existing structure with our deep threaded larger screw. Total length 1 1/8 in. with a 3/8 in. hex head. This screw can be used for a multi-tude of uses in screen enclosures, metal roofs, steel buildings, fences, gates, handrails etc.