Precise cutting of fiber insulation materials. The Bosch GFZ guide system offers precision for professionals working with thick fiber insulation materials such as rock wool and glass wool. To utilize the insulation effectively, a certain level of precision is often required. The PRO Fibre Insulation TF350WM tandem saw blade has been specifically designed for this task. The serrated edge is intended for synthetic insulation materials and allows for precise cuts every time when used with the Bosch GFZ guide system. Not suitable for natural fiber insulation or wood fiber insulation.