TITEN Concrete screws are a quick and convenient way to fasten to concrete. The best thing about these screws is that you can screw directly into concrete without any need for hammering or an anchor or shield to install. All you have to do is drill a hole and drive in the screw. Self-tapping screws are concrete screws that tap threads into the base material such as concrete, brick or block. A hole must first be drilled into the base material and, as the concrete screw is inserted into the hole, the threads are tapped MATERIAL: Heat-treated carbon steel FINISH: Zinc plated with a baked on ceramic coating (1000 HOUR SALT SPRAY TESTED ) The ceramic coating is a non-organic, tri-layered ceramic surface coating developed to attain the best possible performance in the numerous pollutive and atmospheric conditions that cause corrosion. The 1st layer: a metallic zinc layer, the 2nd layer: a high-grade anti-corrosion chemical conversion film, and the 3rd top layer: a baked ceramic top coating. The blue, corrosion-resistant coating enables them to withstand the harshest conditions. And their unmatched performance in concrete, block and brick applications make them an excellent alternative to expansion anchors, plugs and lag shields. Though you don't need to water down the concrete, the water will help to collect and remove the drilling dust, which can be hazardous to your health and "clog" the drill bit. The water can also help to keep your bit from overheating, which in turn helps keep the bit from shattering.