The typical slotted head is most effective made use of with a flat screwdriver, whilst the cross-shaped indention is greatest suited into a Phillips screwdriver. A Robertson screw incorporates a sq.-formed indention and demands a matching driver head. The length of those screws varies, but most drywall screws have flat https://cashwwutq.get-blogging.com/29018710/what-does-screws-mean