The Bosch 1602319009 is a genuine spare part known as an Adjusting Slide (or Switch Slide) , used across a broad range of Bosch power tools, particularly those with a sliding power switch
Angle Grinders: GWS 6-100, GWS 6-115, GWS 600, GWS 660, GWS 670, GWS 780, GWS 850, 1375A
Sanders: GEX 150 TURBO , 1250DEVS
Shears & Jointers: 1500C , 1521 , GFF 22 A
Die Grinders: GGS 28, GGS 5000, and GGS 3000 L