a rail assembly operatively coupled with a table saw, wherein the rail assembly includes a flange defining an opening to at least one slot formed in the rail assembly, wherein the rail assembly includes a first wall opposite a second wall and a lower wall extending between the first wall and the second wall that collectively define a U-shaped configuration, wherein the first wall, the second wall, and the lower wall define the at least one slot;

a rotation stop assembly body having a top and a bottom;

a first aperture defined through the rotation stop assembly body and extending between the top and bottom thereof;

a second aperture defined through the rotation stop assembly body and extending between the top and bottom thereof, the second aperture being parallel to the first aperture;

a rail nut sized to fit within the at least one slot defined in the rail assembly, wherein the opening to the at least one slot is smaller than the rail nut, wherein the rail nut contacts the flange to define an interaction point between the rail assembly and the rail nut;

a screw assembly extending through the first aperture, the screw assembly operable with the rail nut to secure the rotation stop assembly body to the rail assembly of an associated tool; and

a stop bar disposed within the second aperture of the rotation stop assembly body and moveable relative thereto;

wherein the stop bar is operable to engage a top surface of a piece of material to support the rail assembly and prevent the rotational movement of the rail assembly relative to the piece of material, wherein the lower wall of the rail assembly is spaced apart and above a bottom surface of the piece of material.