The regular slotted head is most effective utilised with a flat screwdriver, whilst the cross-formed indention is greatest suited to some Phillips screwdriver. A Robertson screw has a sq.-shaped indention and demands a matching driver head. You will discover five differing kinds of screws that the common Do it yourself https://ricardodkptw.bloginder.com/28973599/getting-my-wood-screws-to-work