Our Bosch pruners had made acquaintance with a nail. Then the chain was dull. Dremelsatz ordered, installed on the blue Bosch GRO 10.8 Dremel, after 5 minutes, the chain was sharp again. Better alternative to the grinding rod. Thanks to the conversion lens is mitangebaut, potty, you can actually do anything wrong (except running the wrong grindstone - note room!). Only be the highlight of the start gate should not be forgotten otherwise one grinds joy 5x the whole chain because we no longer know where you started.