A laminating router is a special one-handed tool that is used to create solid and hidden joints in wood or board materials. Its principle of operation is to cut a small, shallow, crescent-shaped groove in the edge of the parts to be joined using a small saw blade. A fastener, the so-called 'slat', is then inserted into these opposing grooves. A lamella is a small, oval and flat moulding made of compressed wood. Once the glue has been applied to the grooves and the slat, the two parts are joined together. Due to the moisture contained in the glue, the slat swells, wedging itself firmly in the grooves and forming a high-strength joint that is completely invisible from the outside when assembled. This method is often used in furniture manufacturing to join boards to form a larger surface area, for example in the creation of table tops, or to join parts at corners and angles.