LT-DFZ/K1 is the flush bolt made of steel. It is an optional choice that can be used together with LT-DFZ/HF1 the adjustable foot, LT-WB401-2 the wood floor to make full exhibition floor . It is normally used in between two pieces of exhibition wood floor so that when people step onto the exhibition floor, the floor will be more even. Normally it’s being used together with double deck structure / two story/ mezzanine structure for the first floor and second floor. These type of the floor can normally be used for high-end exhibition use for exhibition booth and trade show booth. It’s green for the environment and it can be reused many times.