4 pairs of precision baseboard alignment dowels. These are the BEST alignment dowels ever offered. Easier to install accurately than any other... All that is needed is a pilot drill and a 13mm and 19mm spade bit. Hard alloy, heavily passivated for zero corrosion means very long life, and the tolerances are so fine there is NO movement possible once they are installed. 4 pairs is enough to make two joints (Joins three baseboards together).