The only finger-training board on the market that comes from the empirical findings of a doctoral thesis - the Transgression from Surfaces for Climbing! The hang board made of high-quality, environmentally friendly polyurethane was developed by the Spanish climber and coach Eva Lopez, who used the results of her doctoral thesis for the board's construction. She also developed a training guide with helpful tips, which is included with the purchase of the board. The hang board itself has a total of 8 different edge depths with widths varying from 6-18mm. This allows you to train the strength of your fingers and intensively at that! The board is thus only appropriate for experienced and well-trained climbers. If you're looking to boost your performance, the Transgression is right up your alley.