These holes cover the screws and they are utilised with pocket hole jigs. They supply safe joints. Such a screw includes a self-tapping suggestion, and pilot holes aren't important. Straight under the head lies the shank, a sleek region of the screw without threading; not all screws have a single. https://stainless-steel-fixings-s01975.newsbloger.com/31060669/indicators-on-wood-screws-you-should-know