Raco Difencoum 0.005% highly palatable sachets.
This pack is ideal for mice although the 24 pack will kill perhaps 2-3 rats, but around 20-30 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.
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.
Will kill mice in 5-7 days
for instructional video