Phillips screwdrivers Use a cross-formed suggestion that fits right into a corresponding recess from the screw head. Pozidriv screwdrivers are much like Phillips but have added points of Speak to for far better grip. Robertson screwdrivers have sq.-shaped strategies that in good shape snugly into your recess with the screws. https://rylansurpo.techionblog.com/29391976/the-types-of-screw-heads-names-diaries