No More Rust Stains! These Stainless Steel Lag Screws are 304 Stainless Steel which is one of the highest forms of corrosion resistant steel, making it last longer than other hardware on the market today. Deep cut, coarse threads for superior holding and prevent stripping in the material. Bolt Dropper hex lag bolts are solid stainless steel. No exterior finish, no coatings, nothing but the finest 100% 18-8 (304) stainless steel. You'll never have to worry about the "stainless steel coating" chipping because there is none!