TD-6816MG is a high quality screwdriver that has 16 bits built in, it is made by Vessel which is the leading brand for high quality screwdrivers in Japan. The screwdriver comes with a high quality grip which is oil resistant and it has a 72 gear ratchet which enables a smooth rotation (see video below).The 16 bits that are included are of four different types: positive, negative, hexagonal and torx.Positive: No1, No2 and No3 which means it will fit anything from M2 to M6.Negative: 4mm and 6mm.Hexagonal: M2, M2.5, M3, M4, M5, M6.Torx: T10H, T15H, T20H, T25H, T30H, T40H. These will fit anything from M2.5 to M8 screws.---------Vessel was founded in 1916 and became the first large scale manufacturer of screwdrivers in Japan. Their tools are designed with JIS standard "also" taken into consideration. In other words, their bits are versatile, good for JIS, ISO, DIN, ASME...
VESSEL was a member of the committee who established the JIS (Japan Industrial Standards) after World War II because they were (and "are") the leading company of various tools in Japan.
The JIS has been treated as a kind of reference or guidance for the screws (and screwdrivers), and what is important to the screw manufacturers is not the cross recess on the screw head, with which the tip-end of the screwdriver has contact, but the thread design of the screw in the end.
VESSEL has been monitoring the commercially available screws and checking the matching with them, and if necessary, modified the specifications. This has made their bits to be suitable for a wide variety of screw, not only JIS but also other standards.
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