Daggerz™ Dagger-Lok wood screws are a high quality screw designed for general wood fastening applications. The flat head with nibs under the head allow the screw to self-countersink and sit flush in the wood. The deep threads provide maximum holding power in softwoods and hardwoods. A type 17 point eliminates pre-drilling and cuts into the wood for faster and easier installation when compared to traditional sharp points. These screws work great in most woods, including hardwoods and plywoods. The zinc finish is recommended for installations in dry interior environments only.