Screwdriver manual operation trigger switch Jlevel FA021-5801 7.2-24V DC 16A 5E4, with integrated reverse module, compatible with Hitachi drill-screwdrivers. Body housing size ~25*29 mm, Button size ~17*27, the distance between the upper edge of the reverse engaging pin and the lower body edge ~38 mm. Reverse lever length between axles centers ~9 mm. Integrated transistor speed control and backlight