Spax No. 6 S X 1 in. L Phillips/Square Flat Head Multi-Purpose Screws 40 pk

Patented flat head design featuring ribs on the underside of the head facilitates a clean, flush or countersunk finish in wood and acts as a brake against metal hardware to prevent stripping out. For use with either a phillips or square drive bit.
Easy to use
Multiple material thread for wood, metal, masonry
Self tapping and self drilling
Masonry and concrete do require pre-drilling
Made of stainless steel with zinc finish