Excentric Sander GEX 12V-77. The GEX 12V-77 cordless sander is a powerful spot sander you can rely on, thanks to its robust Bosch Professional 12V system and brushless motor. The excellent ergonomics of this compact and user-friendly tool make efficient fine sanding effortless and easy. With the convenient HMI functions, you can pre-select and finely adjust the speed setting using the trigger for variable speed, as well as check the battery status. The GEX 12V-77 is suitable for spot sanding, repairing painted surfaces, finishing in the automotive sector, and sanding wood. It can be used for both dry and wet sanding. The Professional 12V system is compatible with all GBA 12V batteries. The GEX 12V-77 features an oscillation circuit of 2.5 mm for the eccentric movement and a sanding pad of 77 mm. Cardboard.