The conventional slotted head is very best utilised which has a flat screwdriver, whilst the cross-shaped indention is most effective suited to some Phillips screwdriver. A Robertson screw incorporates a sq.-formed indention and needs a matching driver head. The length of such screws differs, but most drywall screws have flat https://timco-screws86318.blogpixi.com/28929840/what-does-screws-mean