Demo: The difference between tek, CSK, & self tapping screws

A demonstration on the difference between self-tap, self-dril and countersunk screws. Screws used in this video: Self drill screws: https://multifixuk.com/categories/drill-fast-tek-screws Self tap screws: https://multifixuk.com/categories/self-tapping-screws CSK screws: https://multifixuk.com/categories/zinc-countersunk