With assembly aid – furniture sides can be pulled up to 4 mm away from the front edge of the shelf. Double security through internal and external locking - the dowel is always tightened centrally, thus preventing the shifting of furniture parts. The eccentric can be tightened with a slotted screwdriver, cross screwdriver PZ 3, or hex key SW 4. Available with and without a cover edge; the cover edge conceals unsightly drill holes, and an additional cover cap is not required. Zinc die-cast.