The fire resistant fitting SB/FS 2200K ES1 is a stainless steel handle security fitting with cylinder protection and fixable bearing. Since the substructure and the core of the fitting are made of steel and have a melting point of over 1000 °C, the fitting is still functional even in case of a fire. The DIN 18257 also governs a continuous function test of at least 200,000 opening and closing operations without damage, such as cracks or deformations. This shall ensure that the fire resistant fittings are still functional even after longer use.