The conventional slotted head is most effective made use of that has a flat screwdriver, when the cross-formed indention is finest suited to your Phillips screwdriver. A Robertson screw contains a sq.-formed indention and demands a matching driver head. You cannot utilize a pozi driver over a Philips push screw, https://brooksxwtpm.bloggerswise.com/35088286/the-basic-principles-of-wood-screws