The Big Cheese Ultra Power Traps are performance tested to ensure effective control of rats just like the traps that professionals use. Ultra Power Traps are also easy to set and supplied baited ready-to-use. Simply remove the bait cover and squeeze the trap to set the traps are guaranteed to kill rats, or your money back. For best results place the two traps 4-5 metres apart where rats are active. Heavy infestations may require more traps.