K20 is a bonding slat with the same format as the original size 20 wood slat. The furniture connector K20 has barbs on the sides which are anchored in the 4 mm groove when inserted. The bonding slat is ideal for difficult-to-stretch workpieces such as panels or covers. It holds workpieces in the correct position until the glue dries. Since the glue does not adhere to the plastic surface, it is useful to alternate between wooden slats and K20 slats. The K20 slats also hold the part in place and the wooden slat gives the wood joint the final strength. The 4 mm groove can be milled at almost any angle with any Lamello groove router.