A great way to test the confidence in your martial arts techniques is by breaking real boards with them.
The SuperStar Karate Real Wood Boards are made of white pine and have a thickness of 1" and come in sets of 3 boards.
They are available in 4 different sizes: 4"x12", 6"x12", 8"x12" and 10"x12".
Not sure about what size to get?
Click on the picture with "Determining the Size of Your Boards" at the top. Then just follow the instructions.