Einhell BG-CS 85 E Sägekettenschärfgerät, 85 Watt, 4800 rev / min, depth stop, chuck (tool)
Actually, I'll do the sharpening with a file manually. But from time to time I use the unit just as well, with due caution when setting, very carefully, regrind the correct, optimum angle. Exactly this, the device is quite good and has a good price /