CLK cup-lock tower slab formwork is a system offering very practical and suitable solutions on all kinds of slabs such as beamed, hollow-tile or cork tile. The level differences available especially on the deck or ground can be sorted out easily with this system. Since the system consists of a few components, the erection is very practical. Four horizontal elements are fastened to the vertical element at a single point with a hammer blow. Locking kits placed on the vertical elements with a distance of 50 cm or 100 cm are the connection points of the horizontal elements. A locking kit consists of lower cup welded to vertical element and upper cup moveable along the vertical element. By turning downward with a hammer blow, the upper cup fastens the heads of horizontal element assembled between lower and upper cups rigidly.