Assertion: screwdriver's bit | /r/HasProperty | designated by letter
Facets:
value: often
type: TEMPORAL
Source sentences:
text: 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.