Here is a picture of the mystery device: I have mailed the distributor for an explanation what fish are targeted and how the thing is supposed to work, his response (most of it probably lost in translation

Hello friend.
This for big fish.like Grass carp, carp, the herring.you can try this below:
1, the food group clutched the real, in the middle break apart, explosion hook on top of the line caught in the bait;
2, the average allocation hook in the location of the food groups, Gou Jian inwards, insert bait Mission; (very important, related to the hook in the bait distribution)
3, the left hand grip the main line of hook exploded on the bait group (main role is to block the bait) the right hand to pull the explosive hook, explosion hook the sub-line is like the lantern muscles tightly to draw the live bait group;
4, once again clenched the food groups, spare.
Recommended use of lead sinkers
1, the principle of explosion hook fishing --------- thrown designated 4-5 minutes of opening, the hook is buried in the bait fish into taking the hook to breathe mouth, pull the pole in fish;
Without sinker, the main line can not tighten, tighten the bait of casual hook pulled away from the bait pile, could not catch any fish, the position can be fixed hook bait, sinker and increase the probability of the fish;
The use of lead sinkers can discover the fishing season to send line (thread).
thanks a lot.
hannah
which leaves me just as bamboozled. Any ideas?