Daggerz™ brand sheet metal screws are a high quality screw designed for metal-to-metal fastening jobs. The needle piercing point penetrates through metal easily and eliminates the need for any pre-drilling. These screws work excellent for attaching sheet metal to light gauge metal and anchoring fixtures into light gauge metal. They feature hex washer head and a bonded washer that creates a leak proof seal. The zinc finish is recommended for installations in dry interior environments only.