There is certainly several different combos; having said that, the most common will be the flathead and Phillips head mixtures. The only thing to listen to is When the screw is angled under the head due to the fact this means it will need countersunk. Please read on to understand https://dantezbzxu.mybloglicious.com/50448875/types-of-screw-heads-for-screwdrivers-for-dummies