This is a pair of cast iron table extensions for the AT315SB saw bench. These can be fitted in two different ways, either one on each side of the saw table, giving equal support on both sides of the blade, or both to the right hand side of the blade, using the included support leg for stability. This will then allow the optional sliding table kit to be fitted for panel or board cutting. A set of longer rip fence support rails are included which will fit however you decide to fit the tables. A most useful accessory for larger work.