High quality 100% stainless steel screws made from the finest 305 stainless steel, highly corrosion resistant and ideal for indoor or outdoor applications. 77 stainless steel screws included. Flat head design with nibs offers the smoothest drilling and ensures each screw sits flush with the material. The #2 square drive head outperforms Phillips head screws and is less likely to strip, increasing productivity and saving time. Type 17 self-tapping cutting tip prevents splits and often eliminates the need for a pilot hole. Specifications and Dimensions: #10 diameter; 2-1/2" length; Coarse (standard) thread; Type 17 wood cutting tip; #2 square drive; Flat head with nibs. Made from premium grade 305 stainless steel that is far superior to standard steel, with a durable black oxide finish providing rust, stain and corrosion resistance in all weather, especially in outdoor and high moisture settings.