NOT KNOWN FACTUAL STATEMENTS ABOUT SCREWS

The standard slotted head is very best utilized having a flat screwdriver, whilst the cross-formed indention is best suited to a Phillips screwdriver. A Robertson screw has a sq.-shaped indention and needs a matching driver head.You can't utilize a pozi driver on a Philips push screw, and you cannot make use of a Philips driver with a pozi drive sc