FASTAP Interior Self-Drilling Screws have a patented self-drilling Power Point , which creates a perfectly sized pilot hole as the screw is being installed. No pre-drilling is needed even in hardwoods or close-to-the-edge situations. The 45 thread angle of our screws along with the coarse thread eliminate pull-out. Our longer unthreaded shank lengths help the lumber draw together without any gaps. The nibs under the flat head allow the screw head to cut into the wood, and the nibs lock the screw in tight.