Parts List. 1375A Grinder . Small angle grinders 500 W1900 W Bosch Power Tools. Small angle grinders 500 W1900 W. The small angle grinders are powerful, handy tools from Bosch for working on metal the restart protection and KickBack Control ensure safety. Bosch Angle Grinder GWS 900100 (4") 900W Heavy Duty . Bosch Angle Grinder GWS 900100 (4") 900W Heavy Duty: Amazon: GWS .