The common slotted head is ideal utilised using a flat screwdriver, although the cross-shaped indention is best suited to a Phillips screwdriver. A Robertson screw contains a sq.-formed indention and needs a matching driver head. The length of such screws varies, but most drywall screws have flat heads that are https://edgarbqqqn.is-blog.com/35015650/indicators-on-wood-screws-you-should-know