The typical slotted head is finest applied which has a flat screwdriver, though the cross-formed indention is most effective suited to the Phillips screwdriver. A Robertson screw contains a sq.-formed indention and demands a matching driver head. This bolt, combined with the equipment screw that goes with it, sits on https://timco-screws76318.madmouseblog.com/8926149/facts-about-screws-revealed