Victor Poison-Free Insect Magnet Traps work by luring and trapping roaches, palmetto bugs, ants, spiders, crickets, scorpions, centipedes and silverfish. The patented pheromone in the traps attracts adult roaches, nymphs, and eggs preventing future growth of the bugs population. It features a patented box that can be placed in tight places such as corners. Roaches can enter the trap through various entry points of the trap. The bugs stick to the glue inside. Each unit comes with 12 traps and so your roach eradication process will be very effective. Victor Poison-Free Insect Magnet Traps work very well to eradicate the bugs a lone but sometime the infestation can be so large. In such a situation, we recommend a poison-free spray for effectiveness.