TWIST LOCK CRAFTSMAN 113.XXX 27" RIP FENCE.  THIS DOES NOT INCLUDE THE SIDE RAILS.  THIS FENCE WAS MODIFIED TO USE A PLEXI GLASS BLADE GUARD CAN BE SWITCHED TO EITHER SIDE.  OPERATES FINE WITH TWIST MOTION OF HANDLE.  ACCOMPLISHES THE SAME THING AS STANDARD, MAY PREVENT BLADE CONTACT IF IT GETS TO CLOSE TO METAL FENCE.