Combat 12 month roach baits are designed to start killing small roaches in hours and provide protection for up to 12 months. The specific combination of food attractants for small roaches and the active ingredient, fipronil, provides quick results and the complete protection and control that you need. Combat 12 month roach baits may be used wherever you see roaches. Let combat 12 month roach baits protect you and your family from roaches for up to a year, so you can concentrate on other things.