Drains the battery pretty fast. Cutting anything thicker than 0.55 mm galvanized is an occupation for a connoisseur. Very sensitive to dust. Compared to DGA 504 - a nail file. The basis for the approval is 6 years of operation for 2 DGA 452s, and 3 years for 4 DGA 504s. If you are not embarrassed by the need to change the melted brush assembly once a year (issue price ~ 400 per set), you can play around. For normal operation, it is better to stay on brushless models.