The typical slotted head is best utilized using a flat screwdriver, whilst the cross-formed indention is best suited to some Phillips screwdriver. A Robertson screw includes a square-shaped indention and needs a matching driver head. The length of those screws varies, but most drywall screws have flat heads that are https://timcoscrews31964.articlesblogger.com/51434937/little-known-facts-about-screws