The "flyer" series from Duo are sinking lures that are designed to "fly". These super long distance lures out cast most hard lures available and will sink to your desired depth. On the retrieve they swim back up to their running depth which is about 3-4ft. If fishing from a boat this technique is handy as you can either allow the lure to sink to a depth then reel it back in knowing it is slowly coming up in the water. If fishing the shallows from a boat or the shore then either do the same or start winding the lure straight away and it will run shallow.
Now fitted with the new reinforced lip which has been added for those shallow water situations when you smack a rock by accident.
Personally the flyer range are now my favourite hard lures due to their long casts and amazing action. I find the best method is once the lure hits the water give it a good "rip" through the water with a sharp jerk of the rod, this seems to set the weight transfer system in place and the lure comes to life for the rest of the retrieve.