Left Side Support for 10" Table Saw Bosch parts keep your tools working their best for any application you can come up with. Features: Extends 12" Used on Model Numbers 4000 Bosch has been in the headlines of state of the art development for over 100 years. From the invention of the jigsaw to their ergonomic designed tools, Bosch as cared about the customer since they started business in 1886.