100 stainless steel anchors (400 series) and one tanged drill bit per box; 5 boxes per shipper. 3/16" diameter Crete-Flex stainless steel screws for masonry and concrete applications. Special heat treatment protects inherent corrosion resistance of the 410 stainless steel material. Stalgard coating provides 1600 hours of salt spray resistance. Oversized 3/16-10 heavy-duty threads (.200" O.D.) provide high in-place performance. <br><br> Flat head with #3 phillips drive.