The typical slotted head is ideal used using a flat screwdriver, even though the cross-formed indention is greatest suited into a Phillips screwdriver. A Robertson screw contains a sq.-shaped indention and demands a matching driver head. This bolt, together with the equipment screw that goes with it, sits on a https://timco-screws64296.blogs-service.com/59593136/the-basic-principles-of-wood-screws