I work on Microwave Stations. I take care of my tools exceptionally well; I don't drop them, mistreat them or abuse them. A spare can quite often be 1200 feet below and the effort needed to achieve work position necessitates the minimum load during tower acsention. The problem with Hitachi drill is the way the battery is locked in the place. Two very small tabs along side the batteries break very easy during insertion. The broken tabs allow the battery to fall loose from the tool endangering anyone or anything beneath the work area, be it 3 feet or 1200 feet. Anything impacted by the falling battery is subject to injury or damage. The tool works very well and is comfortable but be cautious.