Dueling Trees are easily one of my favorite targets. They provide great feedback if you're shooting by yourself but really shine when you're dueling on it with a friend. To use this target for its designed purpose, you and another shooter line up at the same distance from the target with 3 paddles on each side (as shown in the product images). On the start signal each shooter starts shooting the targets on their side, flipping them over to their opponent's side, while their opponent does the same. The first person to flip all of their targets to the other side wins. Any number of rules can be added to spice things up like limiting the number of rounds you can use or making a reload or two mandatory. At any rate, it's a great training tool that you can have loads of fun with.