"Hook 18" (or #18) refers to a standard, very small hook size used for delicate fly fishing.
In several mapping databases, Hook18 is used as a waypoint identifier. slot 1.hook18
The terms are frequently found together in the manufacturing and retail of fishing equipment. "Hook 18" (or #18) refers to a standard,
This is the physical and electrical specification for the connector used by Intel Pentium II and early Pentium III processors. slot 1.hook18