Fish hook designs, shapes, and materials are all variable depending on the intended purpose of the fish hook. Fish hooks are manufactured for a range of purposes from general fishing to extremely limited and specialized applications. Fish hooks are designed to hold various types of artificial, processed, dead or live baits (bait fishing); to act as the foundation for artificial representations of fish prey (fly fishing); or to be attached to or integrated into other devices that represent fish prey (lure fishing). The fish hook or similar device has been made by man for many thousands of years. The world's oldest fish
Fly-killing device that the electrical models do not have to mechanically crush the fly against a hard surface to kill it, avoiding the smeared mess this can create. Also, the electrical grid can be relatively open, reducing air resistance and a rush of air that often deflects smaller insects around conventional swatters. Because of this, electric swatters can also be very effective in killing airborne mosquitos and "no-see-ums". Fly-killing device A fly-killing device is used for pest control of flying insects, such as houseflies, wasps, moths, gnats, and mosquitos. Most such devices are lethal to insects, but some designs (such as certain