Fastap sheet metal screws, with their washer style head, are one of our most popular because of their wide ranging usefulness. Perfect for projects like installing flashing, securing down spouts or installing hardware, just to name a few. They feature a super sharp high efficiency self drilling point that penetrates sheet metal up 20 gauge. No predrilling is needed. Extra wide washer style head distributes load over a wider area without using extra flat washers. Sharp, cutting style threads tap into sheet metal with ease and hold tight in wood or sheet metal to sheet metal.