BOSCH TS1003 LEFT SIDE SUPPORT EXTENSION FOR BOSCH 4000 TABLESAWS. For use with Bosch 4000 10-inch Worksite table saw Extends 12 inches--increasing the width of your table to 52 inches to support wide and long pieces Stores flush to table when not in use. This Bosch TS1003 Left Side Support Extension increase the width of your table to 52 inches when used with the Bosch 4000 10" Worksite Table Saw. Availability: Usually ships the next business day Bosch TS1003 Left Side Support Extension For 4000-09 Table Saw botslesisuex