The Bosch 1604503015 is a genuine replacement wirewound resistor, designed for use in Bosch power tools specifically engineered to manage electrical resistance .This wirewound resistor is typically used in Bosch Angle Grinders (GWS Series), such as the GWS 20-230, GWS 21-230, GWS 22-230, GWS 23-230, GWS 24-230, and GWS 26-230.