Original design originally from Japan. Used in the feudal system as an aid to interrogation or corporal punishment, in combination with the Ishidaki technique of placing a weight on the kneeling convict's lap. Nowadays, it is used as a common piece of equipment during the Japanese art of Shibari. Can also be used in traditional bondage or as an interesting form of physical punishment. Material: hardwoods - oak, beech, ash, hornbeam, walnut, fruit, and possibly exotic woods, depending on the type of hardness and color preferences of the customer. The final finish is the impregnation of the product with a non-toxic vegetable-based oil. Technical description/parameters: The product can be made in a size to suit the customer's needs, the sample size is approximately 80x40 cm. The top part in the sample photo is made up of nine prisms, each of the prisms is cut at a 45° angle at the top to create a still secure edge. The base is formed by another pair of machined prisms. Decorative elements or other modifications can be made on customer's request. On the sample product, the two parts of the base are cut out to make them easier to handle. It has not yet been launched in the Czech Republic, it is the first product of its kind at the market.