Note: You’ll also need to have to speculate in a drywall dimple bit to put in these, because it isn’t normally included in a typical bit established. That is a variation with the counter sunk screw head, though the underneath area of The top is curved, just like a bugle. https://typesofroofdrainage93692.ttblogs.com/8932305/detailed-notes-on-types-of-screw-heads-names