Screwdriver manual operation trigger switch Jlevel FA021A-56 7.2-24V DC 16A 5E4, with integrated reverse module, compatible with some compact drill-screwdrivers. Body housing size ~17*29 mm, Button size ~12*22, the distance between the upper edge of the reverse engaging pin and the lower body edge is 38 mm. Reverse lever length between axles centers ~ 9 mm