There is certainly many different combinations; however, the commonest is definitely the flathead and Phillips head mixtures. The only thing to pay attention to is if the screw is angled underneath the head mainly because What this means is it will need countersunk. Brass screws are anti-corrosive and drinking water-resistant. https://types-of-roof-repair93692.free-blogz.com/76678740/the-definitive-guide-to-types-of-screw-heads-for-screwdrivers