The normal slotted head is ideal applied which has a flat screwdriver, while the cross-shaped indention is very best suited to some Phillips screwdriver. A Robertson screw incorporates a sq.-formed indention and needs a matching driver head. The length of such screws varies, but most drywall screws have flat heads https://manchesterseoagency33209.onzeblog.com/28697870/the-best-side-of-screws