The Planetary Gear Train Assembly (or BPT Gearbox) with Manufacturer Part Number (MPN) 3607030483 is a genuine Bosch spare part specifically for Bosch Angle Exact cordless wrench screwdrivers, such as :
Bosch 0 602 492 621 ANGLE EXACT 30-300 Cordless Screw Driver
Bosch 3 602 D94 602 Angle Exact Ion 23-380 Pn-Accu-Screwdriver 18 V / Eu
Bosch 3 602 D94 607 Angle Exact Ion 30-290 Pn-Accu-Screwdriver 18 V / Eu