Raco Difencoum 0.005% highly palatable sachets.
This pack is ideal for rats or mice 72 pack will kill perhaps 7-12 rats, but around 60-100 mice.
If using for mice, place multiple sachets around the area the mice are active. Check every 48 hours and replace any totally eaten sachets.
If using for rats, place at least 4 sachets at each bait point. You need less bait points for rats than you do for mice as rats will eat a whole meal from one place whereas mice may feed from over 100 different places in one night.
Keep away from children and animals.
You can order plastic mouse bait boxes which will retain the sachets safely.
This is a fairly new product from one of the top producers of rodenticides.
for instructional video