Cross "+ " type ( 5 ): PH000, PH00, PH0, PH1, PH2 ( most common Phillips screwdriver )

Word " - " type ( flat ) 6 : 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm ( the most commonly used word screwdriver )

Hexagon type 6 : H1.3mm, H1.5mm, H2.0mm, H2.5mm, H3.0mm, H4.0mm, ( split model , bicycles , motors, firearms , etc. )

Star " * " type ( hex ) 9 : T4, T5, T6, T7, T8, T9, T10, T15, T20 ( demolition of mobile phones, computers , hard drives , printers , XBOX, XBOX360, razors , etc. )

Inside and outside the triangle "type each one :  3.0, ( demolition small appliances , etc. )

 

Pentagram Type 1 :  2.0, ( removable partial PDAs , cell phones , etc. )

Double "U" shaped one ( " concave" , " fork " type ): U2.6, ( etc. , and some high-end Philips Air Purifier power strip use of such fastening screws