Insect-O-Cutor brand glueboard fly killers work in a similar way to traditional 'fly zappers' in the sense that they use UV light to attract flying insects to the unit. The difference is the insect is then caught on a sticky glueboard instead of being electrocuted or 'zapped' on an electrical grid. Glueboard fly killers are discreet and silent in operation making them ideal for sensitive areas such as food preparation, hotel lobbies, restaurant dining and other commercial back of house areas. Glueboard fly killers are the preferred option for food processing areas such as commercial kitchens due to the fact they are much more hygienic than 'zappers'. The fly is retained whole on the glueboard meaning there is no chance of dead flies or body parts contaminating food products.