The Catchmaster 912 Gold Stick Fly Traps can be placed on window sills or hung vertically in areas of fly activity. These fly traps can be used in garages, homes, offices, barns and stables, dumpsters, etc.
The bait attractant that comes with the Catchmaster 912 Gold Stick Fly Traps Small would just be placed in the bottom white cup like part.
Catchmaster 912 Gold Stick Fly Traps -Small can be used for gnats in kitchens. How effective it would be really depends on the type of flying insect you are actually dealing with though.