SanTus Phillips Screwdriver PH1 (+) ST363
Two-color precision screwdriver series
Front end special
High material chrome vanadium steel
Special non-slip plastic material
Material and A.B.S resistance
Plastic two-color manufacturing
The Phillips screw drive (specified as an ANSI Type I Cross Recess) was created by John P. Thompson, who after failing to interest manufacturers, sold his design to businessman Henry F. Phillips. Phillips is credited with forming a company (Phillips Screw Company), improving the design, and promoting the adoption of his product. The original patent expired in 1966, but the Phillips Screw Company continued to develop improved designs.
Phillips drive bits are often designated by the letters “PH”, plus a size code 0000, 000, 00, 0, 1, 2, 3, or 4 (in order of increasing size); the numerical bit size codes do not necessarily correspond to nominal screw size numbers.